{"id":14891,"date":"2025-06-10T18:11:30","date_gmt":"2025-06-10T11:11:30","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=14891"},"modified":"2025-07-05T16:35:04","modified_gmt":"2025-07-05T09:35:04","slug":"ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/","title":{"rendered":"T\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m: Kh\u00e1i ni\u1ec7m, c\u00f4ng th\u1ee9c &amp; c\u00e1ch gi\u1ea3i b\u00e0i t\u1eadp d\u1ec5 hi\u1ec3u nh\u1ea5t"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Ti_so_phan_tram_la_gi\" >T\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Y_nghia_cua_ti_so_phan_tram\" >\u00dd ngh\u0129a c\u1ee7a t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Cac_cong_thuc_tinh_ti_so_phan_tram_chi_tiet\" >C\u00e1c c\u00f4ng th\u1ee9c t\u00ednh t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m chi ti\u1ebft<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Cong_thuc_tinh_phan_tram_giua_2_so\" >C\u00f4ng th\u1ee9c t\u00ednh ph\u1ea7n tr\u0103m gi\u1eefa 2 s\u1ed1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Cong_thuc_tinh_ti_so_cua_mot_so\" >C\u00f4ng th\u1ee9c t\u00ednh t\u1ec9 s\u1ed1 % c\u1ee7a m\u1ed9t s\u1ed1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Cong_thuc_tim_mot_so_khi_biet_phan_tram_cua_so_do\" >C\u00f4ng th\u1ee9c t\u00ecm m\u1ed9t s\u1ed1 khi bi\u1ebft ph\u1ea7n tr\u0103m c\u1ee7a s\u1ed1 \u0111\u00f3<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Cac_dang_bai_tap_tinh_ty_so_phan_tram_thuong_gap_va_phuong_phap_giai\" >C\u00e1c d\u1ea1ng b\u00e0i t\u1eadp t\u00ednh t\u1ef7 s\u1ed1 ph\u1ea7n tr\u0103m th\u01b0\u1eddng g\u1eb7p v\u00e0 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Dang_1_Bai_toan_ve_cong_tru_nhan_chia_ti_so_phan_tram\" >D\u1ea1ng 1: B\u00e0i to\u00e1n v\u1ec1 c\u1ed9ng, tr\u1eeb, nh\u00e2n, chia t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Dang_2_Tim_ti_so_phan_tram_cua_hai_so\" >D\u1ea1ng 2: T\u00ecm t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m c\u1ee7a hai s\u1ed1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Dang_3_Tim_phan_tram_cua_mot_so\" >D\u1ea1ng 3: T\u00ecm ph\u1ea7n tr\u0103m c\u1ee7a m\u1ed9t s\u1ed1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Dang_4_Tim_mot_so_khi_biet_gia_tri_phan_tram_cua_so_do\" >D\u1ea1ng 4: T\u00ecm m\u1ed9t s\u1ed1 khi bi\u1ebft gi\u00e1 tr\u1ecb ph\u1ea7n tr\u0103m c\u1ee7a s\u1ed1 \u0111\u00f3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Dang_5_Bai_toan_ve_tinh_lai_tinh_von\" >D\u1ea1ng 5: B\u00e0i to\u00e1n v\u1ec1 t\u00ednh l\u00e3i, t\u00ednh v\u1ed1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Dang_6_Bai_toan_dua_ve_dang_toan_quen_thuoc\" >D\u1ea1ng 6: B\u00e0i to\u00e1n \u0111\u01b0a v\u1ec1 d\u1ea1ng to\u00e1n quen thu\u1ed9c<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Bai_tap_tinh_ti_so_phan_tram_de_hoc_sinh_luyen_tap\" >B\u00e0i t\u1eadp t\u00ednh t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m \u0111\u1ec3 h\u1ecdc sinh luy\u1ec7n t\u1eadp<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Ung_dung_cong_thuc_tinh_ti_so_phan_tram_vao_thuc_tien\" >\u1ee8ng d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m v\u00e0o th\u1ef1c ti\u1ec5n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.ckconitsha.com\/vn\/ti-so-phan-tram-khai-niem-cong-thuc-cach-giai-bai-tap-de-hieu-nhat\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>T\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m l\u00e0 m\u1ed9t ph\u1ea7n ki\u1ebfn th\u1ee9c to\u00e1n h\u1ecdc m\u00e0 b\u1ea5t k\u1ef3 h\u1ecdc sinh n\u00e3o c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc, l\u00e0m quen v\u00e0 gi\u1ea3i b\u00e0i t\u1eadp. Tuy nhi\u00ean, \u0111\u1ec3 gi\u1ea3i b\u00e0i t\u1eadp \u0111\u00f2i h\u1ecfi h\u1ecdc sinh ph\u1ea3i n\u1eafm r\u00f5 ki\u1ebfn th\u1ee9c c\u00f4ng th\u1ee9c v\u00e0 c\u00e1ch t\u00ednh. V\u1eady n\u00ean, trong n\u1ed9i dung b\u00e0i vi\u1ebft sau \u0111\u00e2y Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd ph\u00e2n t\u00edch chi ti\u1ebft nh\u1ea5t.<\/p>\n<p>                        View all<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ti_so_phan_tram_la_gi\"><\/span>T\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">T\u1ef7 s\u1ed1 c\u1ee7a hai s\u1ed1 \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn ch\u00ednh l\u00e0 ph\u00e2n s\u1ed1, l\u00e0 th\u01b0\u01a1ng c\u1ee7a ph\u00e9p chia s\u1ed1 a cho b (b kh\u00e1c 0). K\u00fd hi\u1ec7u a\/b ho\u1eb7c a : b.<\/p>\n<p dir=\"ltr\">T\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m ch\u00ednh l\u00e0 t\u1ec9 s\u1ed1 c\u1ee7a hai s\u1ed1 m\u00e0 \u1edf \u0111\u00e2y, ta s\u1ebd ph\u1ea3i th\u1ef1c hi\u1ec7n quy \u0111\u1ed3ng m\u1eabu s\u1ed1 c\u1ee7a nh\u1eefng t\u1ec9 s\u1ed1 \u0111\u00f3 v\u1ec1 100. K\u00fd hi\u1ec7u: %.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: 50% t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi 50\/100, ho\u1eb7c l\u00e0 0.5. \u0110\u1ecdc l\u00e0 n\u0103m m\u01b0\u01a1i ph\u1ea7n tr\u0103m.<\/em><\/p>\n<p dir=\"ltr\">Ngo\u00e0i ra, t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng \u0111\u1ec3 bi\u1ec3u th\u1ecb \u0111\u1ed9 l\u1edbn t\u01b0\u01a1ng \u1ee9ng c\u1ee7a m\u1ed9t l\u01b0\u1ee3ng n\u00e0y v\u1edbi l\u01b0\u1ee3ng kia. <em>V\u00ed d\u1ee5: 1\/100=1%, 25\/100=25%<\/em><\/p>\n<p dir=\"ltr\">\u0110\u1ec3 c\u00f3 th\u1ec3 bi\u1ec3u di\u1ec5n \u0111\u01b0\u1ee3c t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m c\u1ee7a m\u1ed9t s\u1ed1 a, v\u1edbi a l\u00e0 s\u1ed1 th\u1eadp ph\u00e2n ho\u1eb7c s\u1ed1 t\u1ef1 nhi\u00ean, ta c\u00f3 a : 100 ho\u1eb7c a\/100 = a%<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: 15\/100 = 15%<\/em><\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/ti-so-phan-tram-la-gi-1.jpg\" alt=\"T\u1ef7 s\u1ed1 ph\u1ea7n tr\u0103m d\u00f9ng \u0111\u1ec3 bi\u1ec3u th\u1ecb \u0111\u1ed9 l\u1edbn t\u01b0\u01a1ng \u1ee9ng c\u1ee7a m\u1ed9t l\u01b0\u1ee3ng n\u00e0y v\u1edbi l\u01b0\u1ee3ng kia. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Y_nghia_cua_ti_so_phan_tram\"><\/span>\u00dd ngh\u0129a c\u1ee7a t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong to\u00e1n h\u1ecdc, ph\u1ea7n tr\u0103m t\u1ec9 s\u1ed1 th\u1ef1c ch\u1ea5t ch\u00ednh l\u00e0 ph\u00e2n s\u1ed1 v\u1edbi m\u1eabu s\u1ed1 l\u00e0 100. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 bi\u1ec3u th\u1ecb m\u1ee9c \u0111\u1ed9 l\u1edbn t\u01b0\u01a1ng \u0111\u1ed1i c\u1ee7a l\u01b0\u1ee3ng n\u00e0y so v\u1edbi l\u01b0\u1ee3ng kia. C\u1ee5 th\u1ec3, \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1ea7u ti\u00ean s\u1ebd th\u1ec3 hi\u1ec7n ph\u1ea7n t\u01b0\u01a1ng \u1ee9ng ho\u1eb7c ph\u1ea7n thay \u0111\u1ed5i so v\u1edbi \u0111\u1ea1i l\u01b0\u1ee3ng th\u1ee9 hai.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: M\u1ed9t s\u1ed1 ti\u1ec1n 50.000 \u0111\u1ed3ng sau khi l\u00e3i t\u0103ng th\u00eam 3.800 \u0111\u1ed3ng, nh\u01b0 v\u1eady s\u1ed1 ti\u1ec1n t\u0103ng l\u00ean m\u1ed9t ph\u1ea7n b\u1eb1ng 3.800 \/ 50.000 = 0,076 l\u1ea7n s\u1ed1 ti\u1ec1n ban \u0111\u1ea7u. N\u1ebfu di\u1ec5n \u0111\u1ea1t theo ph\u1ea7n tr\u0103m, ta n\u00f3i s\u1ed1 ti\u1ec1n 50.000 \u0111\u1ed3ng \u0111\u00e3 l\u00e3i th\u00eam 7,6%.<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_cong_thuc_tinh_ti_so_phan_tram_chi_tiet\"><\/span>C\u00e1c c\u00f4ng th\u1ee9c t\u00ednh t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m chi ti\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 c\u00f3 th\u1ec3 chinh ph\u1ee5c \u0111\u01b0\u1ee3c c\u00e1c b\u00e0i t\u1eadp khi h\u1ecdc to\u00e1n t\u1ef7 s\u1ed1 ph\u1ea7n tr\u0103m, c\u00e1c em c\u1ea7n ph\u1ea3i n\u1eafm ch\u1eafc c\u00e1c c\u00e1ch t\u00ednh t\u1ef7 s\u1ed1 ph\u1ea7n tr\u0103m trong t\u1eebng tr\u01b0\u1eddng h\u1ee3p sau \u0111\u00e2y:<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/ti-so-phan-tram-la-gi-2.jpg\" alt=\"Trong to\u00e1n h\u1ecdc v\u00e0 th\u1ef1c ti\u1ec5n, c\u1ea7n ph\u1ea3i n\u1eafm r\u00f5 c\u00e1c c\u00f4ng th\u1ee9c li\u00ean quan t\u1edbi vi\u1ec7c t\u00ednh t\u1ec9 s\u1ed1 %. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_phan_tram_giua_2_so\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh ph\u1ea7n tr\u0103m gi\u1eefa 2 s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ec3 c\u00f3 th\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c ph\u1ea7n tr\u0103m t\u1ec9 s\u1ed1 c\u1ee7a A v\u00e0 B, ta ti\u1ebfn h\u00e0nh l\u1ea5y A chia B r\u1ed3i nh\u00e2n 100 r\u1ed3i th\u00eam k\u00fd hi\u1ec7u % v\u00e0o k\u1ebft qu\u1ea3.<\/p>\n<p dir=\"ltr\">C\u1ee5 th\u1ec3:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">A \/ B x 100%<\/p>\n<p dir=\"ltr\">Th\u1ef1c ch\u1ea5t, gi\u00e1 tr\u1ecb c\u1ee7a vi\u1ec7c nh\u00e2n th\u00eam 100% kh\u00f4ng thay \u0111\u1ed5i so v\u1edbi chia A v\u00e0 B. B\u1edfi v\u00ec, khi nh\u00e2n 100% ngh\u0129a l\u00e0 x 100\/100 t\u1ee9c l\u00e0 x 1. V\u1eady n\u00ean, n\u1ebfu ghi th\u00eam k\u00fd hi\u1ec7u % th\u00ec ng\u01b0\u1eddi \u0111\u1ecdc s\u1ebd th\u1ea7m hi\u1ec3u \u0111\u01b0\u1ee3c r\u1eb1ng gi\u00e1 tr\u1ecb th\u1ef1c c\u1ee7a t\u1ef7 s\u1ed1 A\/B ph\u1ea3i l\u1ea5y ph\u1ea7n s\u1ed1 kh\u00f4ng c\u00f3 k\u00fd hi\u1ec7u % chia cho 100.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: M\u1ed9t b\u00f3 hoa c\u00f3 25 b\u00f4ng hoa, trong \u0111\u00f3 c\u00f3 6 b\u00f4ng hoa v\u00e0ng. T\u00ecm t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m c\u1ee7a b\u00f4ng hoa v\u00e0ng so v\u1edbi t\u1ed5ng s\u1ed1 b\u00f4ng hoa?<\/em><\/p>\n<p dir=\"ltr\"><em>C\u00e1ch gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>Xem A l\u00e0 25 b\u00f4ng hoa t\u1ed5ng c\u1ed9ng, s\u1ed1 B l\u00e0 6 b\u00f4ng hoa v\u00e0ng. T\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m c\u1ee7a b\u00f4ng hoa v\u00e0ng trong b\u00f3 hoa l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>(6 : 25) x 100 = 24%<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e1p s\u1ed1: 24% b\u00f4ng hoa v\u00e0ng<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_ti_so_cua_mot_so\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh t\u1ec9 s\u1ed1 % c\u1ee7a m\u1ed9t s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Mu\u1ed1n t\u00ecm ph\u1ea7n tr\u0103m c\u1ee7a m\u1ed9t s\u1ed1, ta s\u1ebd ti\u1ebfn h\u00e0nh l\u1ea5y s\u1ed1 \u0111\u00f3 chia cho 100, r\u1ed3i ti\u1ebfp t\u1ee5c nh\u00e2n v\u1edbi s\u1ed1 % ho\u1eb7c l\u1ea5y s\u1ed1 \u0111\u00f3 nh\u00e2n v\u1edbi s\u1ed1 % r\u1ed3i chia cho 100.<\/p>\n<p dir=\"ltr\">C\u1ee5 th\u1ec3:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">A x a% = A : 100 x a<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: M\u1ed9t cu\u1ed9n v\u1ea3i d\u00e0i 300m, th\u1ee3 may c\u1eaft \u0111\u01b0\u1ee3c 30% chi\u1ec1u d\u00e0i c\u1ee7a cu\u1ed9n v\u1ea3i \u0111\u00f3. H\u1ecfi ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a cu\u1ed9n v\u1ea3i m\u00e0 th\u1ee3 may c\u1ea7n ph\u1ea3i c\u1eaft l\u00e0 bao nhi\u00eau?<\/em><\/p>\n<p dir=\"ltr\"><em>C\u00e1ch gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>Cu\u1ed9n v\u1ea3i \u0111\u00e3 c\u1eaft \u0111\u01b0\u1ee3c: 30% x 300 = 90 m\u00e9t<\/em><\/p>\n<p dir=\"ltr\"><em>Ph\u1ea7n v\u1ea3i c\u00f2n l\u1ea1i c\u1ea7n ph\u1ea3i c\u1eaft l\u00e0: 300 &#8211; 90 = 210 m\u00e9t<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e1p s\u1ed1: 210 m\u00e9t v\u1ea3i.<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tim_mot_so_khi_biet_phan_tram_cua_so_do\"><\/span>C\u00f4ng th\u1ee9c t\u00ecm m\u1ed9t s\u1ed1 khi bi\u1ebft ph\u1ea7n tr\u0103m c\u1ee7a s\u1ed1 \u0111\u00f3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">N\u1ebfu \u0111\u1ec1 b\u00e0i cho bi\u1ebft ph\u1ea7n tr\u0103m c\u1ee7a m\u1ed9t s\u1ed1 v\u00e0 \u0111i t\u00ecm gi\u00e1 tr\u1ecb c\u1ee7a s\u1ed1 \u0111\u00f3, ta s\u1ebd ti\u1ebfn h\u00e0nh l\u1ea5y s\u1ed1 \u0111\u00f3 chia cho s\u1ed1 ph\u1ea7n tr\u0103m r\u1ed3i nh\u00e2n 100 ho\u1eb7c c\u00f3 th\u1ec3 l\u1ea5y gi\u00e1 tr\u1ecb \u0111\u00f3 nh\u00e2n 100 v\u00e0 chia cho s\u1ed1 ph\u1ea7n tr\u0103m \u0111\u00e3 bi\u1ebft.<\/p>\n<p dir=\"ltr\">C\u1ee5 th\u1ec3, mu\u1ed1n t\u00ecm m\u1ed9t s\u1ed1 bi\u1ebft b% c\u1ee7a s\u1ed1 \u0111\u00f3 l\u00e0 B:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">B : b% = B : b x 100<\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c n\u00e0y s\u1ebd ng\u01b0\u1ee3c l\u1ea1i v\u1edbi c\u00f4ng th\u1ee9c t\u00ecm t\u1ef7 s\u1ed1 % c\u1ee7a m\u1ed9t s\u1ed1 cho tr\u01b0\u1edbc.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: M\u1ed9t quy\u1ec3n s\u00e1ch \u0111\u00e3 \u0111\u1ecdc \u0111\u01b0\u1ee3c 120 trang, chi\u1ebfm 15% s\u1ed1 trang s\u00e1ch. H\u1ecfi cu\u1ed1n s\u00e1ch \u0111\u00f3 c\u00f3 bao nhi\u00eau trang?<\/em><\/p>\n<p dir=\"ltr\"><em>C\u00e1ch gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>B\u1edfi v\u00ec 120 trang chi\u1ebfm 15% s\u1ed1 trang s\u00e1ch n\u00ean suy ra 1% s\u1ed1 trang c\u1ee7a quy\u1ec3n s\u00e1ch \u0111\u00f3 l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>120 : 15% = 8 trang<\/em><\/p>\n<p dir=\"ltr\"><em>V\u1eady s\u1ed1 trang s\u00e1ch l\u00e0: 8 x 100 = 800 trang<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e1p s\u1ed1: 800 trang s\u00e1ch<\/em><\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fbeeb8\" border=\"1\">\n<tr>\n<td style=\"width: 98.5189%\">\n<p style=\"text-align: center\">X\u00c2Y D\u1ef0NG N\u1ec0N T\u1ea2NG TO\u00c1N H\u1eccC V\u1eeeNG CH\u1eaeC CHO TR\u1eba T\u1eea NH\u1ece V\u1edaI \u0110A PH\u01af\u01a0NG PH\u00c1P D\u1ea0Y H\u1eccC T\u00cdCH C\u1ef0C, CHI PH\u00cd C\u1ef0C R\u1eba CH\u01afA \u0110\u1ebeN 2K\/NG\u00c0Y C\u00d9NG MONKEY MATH.<\/p>\n<p style=\"text-align: center\">\u00a0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/timhieungay.png\" alt=\"\" width=\"200\" height=\"41\"><\/p>\n<\/td>\n<\/tr>\n<\/table>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_dang_bai_tap_tinh_ty_so_phan_tram_thuong_gap_va_phuong_phap_giai\"><\/span>C\u00e1c d\u1ea1ng b\u00e0i t\u1eadp t\u00ednh t\u1ef7 s\u1ed1 ph\u1ea7n tr\u0103m th\u01b0\u1eddng g\u1eb7p v\u00e0 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n ti\u1ec3u h\u1ecdc, c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen v\u1edbi ki\u1ebfn th\u1ee9c t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m. C\u00f9ng v\u1edbi \u0111\u00f3, h\u1ecdc sinh s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc v\u00e0 ph\u1ea3i chinh ph\u1ee5c c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp sau:<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/ti-so-phan-tram-la-gi-3a.jpg\" alt=\"Trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n ti\u1ec3u h\u1ecdc, c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen v\u00e0 chinh ph\u1ee5c c\u00e1c b\u00e0i t\u1eadp v\u1ec1 t\u00ednh t\u1ec9 s\u1ed1 %. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_1_Bai_toan_ve_cong_tru_nhan_chia_ti_so_phan_tram\"><\/span>D\u1ea1ng 1: B\u00e0i to\u00e1n v\u1ec1 c\u1ed9ng, tr\u1eeb, nh\u00e2n, chia t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u1ea3i \u0111\u01b0\u1ee3c c\u00e1c b\u00e0i t\u1eadp v\u1ec1 c\u00e1c ph\u00e9p t\u00ednh t\u1ec9 s\u1ed1 %, ta \u00e1p d\u1ee5ng nh\u1eefng c\u00f4ng th\u1ee9c sau:<\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c to\u00e1n c\u1ed9ng: a% + b% = (a + b)%.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: 5% + 12% = (5 + 12)% = 18%<\/em><\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c to\u00e1n tr\u1eeb a% &#8211; b% = (a &#8211; b)%.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: 42% &#8211; 8% = (42 &#8211; 8)% = 34%<\/em><\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c to\u00e1n nh\u00e2n a% \u00d7 b = (a \u00d7 b)%.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: 5% \u00d7 7 = (5 \u00d7 7)% = 35%<\/em><\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c to\u00e1n chia a% : b = (a : b)%<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: 27% : 9 = (27 : 9) = 3%<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_2_Tim_ti_so_phan_tram_cua_hai_so\"><\/span>D\u1ea1ng 2: T\u00ecm t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m c\u1ee7a hai s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i: V\u1edbi d\u1ea1ng b\u00e0i t\u1eadp n\u00e0y, c\u00e1c em s\u1ebd ch\u1ec9 \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ecm t\u1ef7 s\u1ed1 % c\u1ee7a c\u1ea3 hai s\u1ed1 \u0111\u00e3 \u0111\u01b0a ra ph\u00eda tr\u00ean, r\u1ed3i l\u00e0m theo h\u01b0\u1edbng d\u1eabn v\u00e0 \u0111\u01b0a ra \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: M\u1ed9t c\u1eeda h\u00e0ng \u0111\u1eb7t k\u1ebf ho\u1ea1ch th\u00e1ng n\u00e0y b\u00e1n \u0111\u01b0\u1ee3c 12 t\u1ea5n g\u1ea1o, nh\u01b0ng th\u1ef1c t\u1ebf c\u1eeda h\u00e0ng b\u00e1n \u0111\u01b0\u1ee3c 15 t\u1ea5n g\u1ea1o. H\u1ecfi:<\/em><\/p>\n<p dir=\"ltr\"><em>a. C\u1eeda h\u00e0ng \u0111\u00e3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c bao nhi\u00eau ph\u1ea7n tr\u0103m k\u1ebf ho\u1ea1ch?<\/em><\/p>\n<p dir=\"ltr\"><em>b. C\u1eeda h\u00e0ng \u0111\u00e3 v\u01b0\u1ee3t m\u1ee9c k\u1ebf ho\u1ea1ch bao nhi\u00eau ph\u1ea7n tr\u0103m?<\/em><\/p>\n<p dir=\"ltr\"><em>H\u01b0\u1edbng d\u1eabn gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>a. C\u1eeda h\u00e0ng \u0111\u00e3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c so v\u1edbi k\u1ebf ho\u1ea1ch l\u00e0: (15 : 12) x 100 = 125% (k\u1ebf ho\u1ea1ch)<\/em><\/p>\n<p dir=\"ltr\"><em>b. C\u1eeda h\u00e0ng \u0111\u00e3 v\u01b0\u1ee3t m\u1ee9c k\u1ebf ho\u1ea1ch l\u00e0: 125% &#8211; 100% = 25% (k\u1ebf ho\u1ea1ch)<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e1p s\u1ed1:<\/em><\/p>\n<p dir=\"ltr\"><em>a. 125% k\u1ebf ho\u1ea1ch<\/em><\/p>\n<p dir=\"ltr\"><em>b. 25% k\u1ebf ho\u1ea1ch<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_3_Tim_phan_tram_cua_mot_so\"><\/span>D\u1ea1ng 3: T\u00ecm ph\u1ea7n tr\u0103m c\u1ee7a m\u1ed9t s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i: C\u00e1c em c\u0169ng s\u1ebd \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c l\u1ea5y s\u1ed1 \u0111\u00f3 chia cho 100 r\u1ed3i nh\u00e2n v\u1edbi s\u1ed1 %, ho\u1eb7c l\u1ea5y s\u1ed1 \u0111\u00e3 cho nh\u00e2n v\u1edbi s\u1ed1 % r\u1ed3i chia cho 100 \u0111\u1ec3 c\u00f3 th\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb % c\u1ee7a m\u1ed9t s\u1ed1 t\u01b0\u01a1ng \u1ee9ng ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: L\u1edbp 5A c\u00f3 30 h\u1ecdc sinh trong \u0111\u00f3 s\u1ed1 h\u1ecdc sinh n\u1eef chi\u1ebfm 60%. H\u1ecfi s\u1ed1 h\u1ecdc sinh n\u1eef c\u00f3 bao nhi\u00eau em.<\/em><\/p>\n<p dir=\"ltr\"><em>H\u01b0\u1edbng d\u1eabn gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>S\u1ed1 h\u1ecdc sinh nh\u1eefng c\u1ee7a l\u1edbp 5A l\u00e0: 30 : 100 x 60 = 18 (h\u1ecdc sinh)<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e1p s\u1ed1: 18 (h\u1ecdc sinh n\u1eef)<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_4_Tim_mot_so_khi_biet_gia_tri_phan_tram_cua_so_do\"><\/span>D\u1ea1ng 4: T\u00ecm m\u1ed9t s\u1ed1 khi bi\u1ebft gi\u00e1 tr\u1ecb ph\u1ea7n tr\u0103m c\u1ee7a s\u1ed1 \u0111\u00f3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i: \u0110\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb m\u1ed9t s\u1ed1 khi bi\u1ebft \u0111\u01b0\u1ee3c s\u1ed1 % c\u1ee7a s\u1ed1 \u0111\u00f3 th\u00ec ta ti\u1ebfn h\u00e0nh l\u1ea5y gi\u00e1 tr\u1ecb \u0111\u00f3 chia cho s\u1ed1 % r\u1ed3i nh\u00e2n 100, ho\u1eb7c c\u00f3 th\u1ec3 l\u1ea5y gi\u00e1 tr\u1ecb \u0111\u00e3 cho nh\u00e2n 100 v\u00e0 chia cho s\u1ed1 % \u0111\u00e3 bi\u1ebft.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: M\u1ed9t l\u1edbp c\u00f3 25% h\u1ecdc sinh gi\u1ecfi, 55% h\u1ecdc sinh kh\u00e1 c\u00f2n l\u1ea1i l\u00e0 h\u1ecdc sinh trung b\u00ecnh. T\u00ednh s\u1ed1 h\u1ecdc sinh c\u1ee7a l\u1edbp \u0111\u00f3 bi\u1ebft s\u1ed1 h\u1ecdc sinh trung b\u00ecnh l\u00e0 5 b\u1ea1n?<\/em><\/p>\n<p dir=\"ltr\"><em>H\u01b0\u1edbng d\u1eabn gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>N\u1ebfu xem t\u1ed5ng s\u1ed1 h\u1ecdc sinh c\u1ee7a l\u1edbp l\u00e0 100% th\u00ec s\u1ed1 h\u1ecdc sinh trung b\u00ecnh so v\u1edbi s\u1ed1 h\u1ecdc sinh c\u1ee7a l\u1edbp l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>100% &#8211; (25% + 55%) = 20%<\/em><\/p>\n<p dir=\"ltr\"><em>S\u1ed1 h\u1ecdc sinh c\u1ee7a l\u1edbp l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>5 : 20 x 100 = 25 (h\u1ecdc sinh)<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e1p s\u1ed1: 25 h\u1ecdc sinh<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_5_Bai_toan_ve_tinh_lai_tinh_von\"><\/span>D\u1ea1ng 5: B\u00e0i to\u00e1n v\u1ec1 t\u00ednh l\u00e3i, t\u00ednh v\u1ed1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i: \u0110\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c l\u00e3i v\u00e0 v\u1ed1n b\u1ecf ra chi\u1ebfm bao nhi\u00eau ph\u1ea7n tr\u0103m, ta l\u1ea5y % gi\u00e1 b\u00e1n chia cho % gi\u00e1 mua.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: M\u1ed9t c\u1eeda h\u00e0ng \u0111\u1ecbnh gi\u00e1 mua h\u00e0ng b\u1eb1ng 75% gi\u00e1 b\u00e1n. H\u1ecfi c\u1eeda h\u00e0ng \u0111\u00f3 \u0111\u1ecbnh gi\u00e1 b\u00e1n b\u1eb1ng bao nhi\u00eau ph\u1ea7n tr\u0103m gi\u00e1 mua?<\/em><\/p>\n<p dir=\"ltr\"><em>H\u01b0\u1edbng d\u1eabn gi\u1ea3i<\/em><\/p>\n<p dir=\"ltr\"><em>Xem gi\u00e1 b\u00e1n l\u00e0 100% th\u00ec gi\u00e1 mua l\u00e0 75%.<\/em><\/p>\n<p dir=\"ltr\"><em>V\u1eady gi\u00e1 b\u00e1n ra so v\u1edbi gi\u00e1 mua v\u00e0o chi\u1ebfm s\u1ed1 ph\u1ea7n tr\u0103m l\u00e0: 100 : 75 = 133,33%<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e1p s\u1ed1: 133,33% gi\u00e1 mua<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_6_Bai_toan_dua_ve_dang_toan_quen_thuoc\"><\/span>D\u1ea1ng 6: B\u00e0i to\u00e1n \u0111\u01b0a v\u1ec1 d\u1ea1ng to\u00e1n quen thu\u1ed9c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i: V\u1edbi d\u1ea1ng b\u00e0i t\u1eadp n\u00e0y, h\u1ecdc sinh s\u1ebd \u0111\u01b0a d\u1ea1ng to\u00e1n v\u1ec1 nh\u1eefng d\u1ea1ng quen thu\u1ed9c nh\u01b0 t\u1ed5ng \u2013 t\u1ec9, hi\u1ec7u \u2013 t\u1ec9,&#8230; \u0111\u1ec3 t\u00ecm ra \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c, nhanh ch\u00f3ng h\u01a1n.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u1ed5ng c\u1ee7a hai s\u1ed1 b\u1eb1ng 25% th\u01b0\u01a1ng c\u1ee7a hai s\u1ed1 \u0111\u00f3 c\u0169ng b\u1eb1ng 25%. T\u00ecm hai s\u1ed1 \u0111\u00f3.<\/em><\/p>\n<p dir=\"ltr\"><em>H\u01b0\u1edbng d\u1eabn gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>25% = 0,25<\/em><\/p>\n<p dir=\"ltr\"><em>S\u1ed1 th\u1ee9 nh\u1ea5t l\u00e0: 0,25 : (1+4) = 0,05<\/em><\/p>\n<p dir=\"ltr\"><em>S\u1ed1 th\u1ee9 hai l\u00e0: 0,25 \u2013 0,05 = 0,2<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e1p s\u1ed1: 0,05 v\u00e0 0,2<\/em><\/p>\n<p dir=\"ltr\">\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_tinh_ti_so_phan_tram_de_hoc_sinh_luyen_tap\"><\/span>B\u00e0i t\u1eadp t\u00ednh t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m \u0111\u1ec3 h\u1ecdc sinh luy\u1ec7n t\u1eadp<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Sau khi \u0111\u00e3 n\u1eafm ch\u1eafc \u0111\u01b0\u1ee3c l\u00fd thuy\u1ebft c\u1ee7a ki\u1ebfn th\u1ee9c t\u1ef7 s\u1ed1 ph\u1ea7n tr\u0103m, ch\u1eafc h\u1eb3n c\u00e1c em c\u0169ng \u0111\u00e3 y\u00ean t\u00e2m h\u01a1n trong vi\u1ec7c chinh ph\u1ee5c c\u00e1c b\u00e0i t\u1eadp li\u00ean quan. V\u1eady n\u00ean, d\u01b0\u1edbi \u0111\u00e2y Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd t\u1ed5ng h\u1ee3p m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp, c\u00e2u h\u1ecfi \u0111\u1ec3 c\u00e1c em c\u00f9ng nhau luy\u1ec7n t\u1eadp nh\u00e9.<\/p>\n<p dir=\"ltr\">C\u00e2u 1: M\u00f4\u0323t l\u01a1\u0301p ho\u0323c co\u0301 28 b\u1ea1n, trong \u0111o\u0301 co\u0301 7 b\u1ea1n nam. Ha\u0303y ti\u0300m ti\u0309 s\u00f4\u0301 ph\u00e2\u0300n tr\u0103m h\u1ecdc sinh nam so v\u01a1\u0301i s\u0129 s\u1ed1 c\u1ee7a l\u01a1\u0301p?<\/p>\n<p dir=\"ltr\">C\u00e2u 2: Trong chu\u1ed3ng g\u00e0 co\u0301 12 con g\u00e0 m\u00e1i va\u0300 28 con g\u00e0 tr\u1ed1ng. Ti\u0300m ti\u0309 s\u00f4\u0301 ph\u00e2\u0300n tr\u0103m s\u1ed1 g\u00e0 m\u00e1i so v\u01a1\u0301i s\u1ed1 g\u00e0 trong v\u01b0\u01a1\u0300n?<\/p>\n<p dir=\"ltr\">C\u00e2u 3: Di\u1ec7n t\u00edch c\u1ee7a m\u1ed9t v\u01b0\u1eddn hoa l\u00e0 100m2, trong \u0111\u00f3 35m2 tr\u1ed3ng hoa ly. T\u00ecm t\u1ec9 s\u1ed1 di\u1ec7n t\u00edch tr\u1ed3ng hoa ly v\u00e0 di\u1ec7n t\u00edch v\u01b0\u1eddn hoa.<\/p>\n<p dir=\"ltr\">C\u00e2u 4: Vo\u0300i n\u01b0\u01a1\u0301c th\u01b0\u0301 nh\u00e2\u0301t m\u00f4\u0303i gi\u01a1\u0300 cha\u0309y va\u0300o \u0111\u01b0\u01a1\u0323c 1\/6 th\u00ea\u0309 ti\u0301ch cu\u0309a b\u00ea\u0309, vo\u0300i n\u01b0\u01a1\u0301c th\u01b0\u0301 hai m\u00f4\u0303i gi\u01a1\u0300 cha\u0309y va\u0300o \u0111\u01b0\u01a1\u0323c 1\/3 th\u00ea\u0309 ti\u0301ch cu\u0309a b\u00ea\u0309. Ho\u0309i ca\u0309 hai vo\u0300i n\u01b0\u01a1\u0301c cu\u0300ng cha\u0309y va\u0300o b\u00ea\u0309 trong m\u00f4\u0323t gi\u01a1\u0300 thi\u0300 \u0111\u01b0\u01a1\u0323c bao nhi\u00eau ph\u00e2\u0300n tr\u0103m th\u00ea\u0309 ti\u0301ch cu\u0309a b\u00ea\u0309?<\/p>\n<p dir=\"ltr\">C\u00e2u 5: Chi\u1ebfc xe \u0111\u00e3 \u0111i \u0111\u01b0\u1ee3c 40% chi\u1ec1u d\u00e0i c\u1ee7a con \u0111\u01b0\u1eddng d\u00e0i 250 km. T\u00ednh chi\u1ec1u d\u00e0i qu\u00e3ng \u0111\u01b0\u1eddng m\u00e0 xe \u0111\u00e3 \u0111i.<\/p>\n<p dir=\"ltr\">C\u00e2u 6: S\u1ed1 h\u1ecdc sinh gi\u1ecfi c\u1ee7a m\u1ed9t tr\u01b0\u1eddng ti\u1ec3u h\u1ecdc l\u00e0 64 em chi\u1ebfm 12,8 % s\u1ed1 h\u1ecdc sinh to\u00e0n tr\u01b0\u1eddng. H\u1ecfi tr\u01b0\u1eddng \u0111\u00f3 c\u00f3 bao nhi\u00eau h\u1ecdc sinh?<\/p>\n<p dir=\"ltr\">C\u00e2u 7: M\u00f4\u0323t ng\u01b0\u01a1\u0300i bo\u0309 ra 42000\u0111 ti\u00ea\u0300n v\u00f4\u0301n \u0111\u00ea\u0309 mua rau. Sau khi ba\u0301n h\u00ea\u0301t s\u00f4\u0301 rau, ng\u01b0\u01a1\u0300i \u0111o\u0301 thu \u0111\u01b0\u01a1\u0323c 52500\u0111.<\/p>\n<p dir=\"ltr\">a.Ti\u00ea\u0300n ba\u0301n rau b\u0103\u0300ng bao nhi\u00eau ph\u00e2\u0300n tr\u0103m ti\u00ea\u0300n v\u00f4\u0301n?<\/p>\n<p dir=\"ltr\">b.Ng\u01b0\u01a1\u0300i \u0111o\u0301 thu la\u0303i bao nhi\u00eau ph\u00e2\u0300n tr\u0103m?<\/p>\n<p dir=\"ltr\">C\u00e2u 8: M\u1ed9t s\u1ea3n ph\u1ea9m \u0111\u00e3 h\u1ea1 gi\u00e1 b\u00e1n 20% h\u1ecfi mu\u1ed1n b\u00e1n s\u1ea3n ph\u1ea9m \u0111\u00f3 v\u1edbi gi\u00e1 ban \u0111\u1ea7u th\u00ec ph\u1ea3i t\u0103ng gi\u00e1 th\u00eam bao nhi\u00eau ph\u1ea7n tr\u0103m?<\/p>\n<p dir=\"ltr\">C\u00e2u 9: C\u00f4 gi\u00e1o \u0111em chia t\u00e1o cho h\u1ecdc sinh. N\u1ebfu m\u1ed7i em 9 qu\u1ea3 th\u00ec thi\u1ebfu 9 qu\u1ea3. N\u1ebfu chia m\u1ed7i em 10 qu\u1ea3 th\u00ec thi\u1ebfu 25% s\u1ed1 t\u00e1o ban \u0111\u1ea7u. T\u00ednh s\u1ed1 t\u00e1o c\u00f4 \u0111em chia v\u00e0 s\u1ed1 h\u1ecdc sinh \u0111\u01b0\u1ee3c chia t\u00e1o.<\/p>\n<p dir=\"ltr\">C\u00e2u 10: M\u1ed9t ng\u01b0\u1eddi \u0111em tr\u1ee9ng \u0111i b\u00e1n: bu\u1ed5i s\u00e1ng b\u00e1n \u0111\u01b0\u1ee3c 50% s\u1ed1 tr\u1ee9ng, bu\u1ed5i chi\u1ec1u b\u00e1n \u0111\u01b0\u1ee3c 20% s\u1ed1 tr\u1ee9ng c\u00f2n l\u1ea1i. Sau \u0111\u00f3 ng\u01b0\u1eddi \u0111\u00f3 l\u1ea1i bu\u00f4n th\u00eam 40 qu\u1ea3 n\u1eefa. T\u1ed1i v\u1ec1 ng\u01b0\u1eddi \u0111\u00f3 l\u1ea1i th\u1ea5y r\u1eb1ng s\u1ed1 tr\u1ee9ng \u0111em v\u1ec1 b\u1eb1ng 120% s\u1ed1 tr\u1ee9ng mang \u0111i. H\u1ecfi ng\u01b0\u1eddi \u1ea5y mang \u0111i m\u1ea5y qu\u1ea3 tr\u1ee9ng?<\/p>\n<p dir=\"ltr\">C\u00e2u 11: L\u01b0\u1ee3ng mu\u1ed1i ch\u1ee9a trong n\u01b0\u1edbc bi\u1ec3n l\u00e0 5%. C\u1ea7n ph\u1ea3i \u0111\u1ed5 th\u00eam v\u00e0o 200kg n\u01b0\u1edbc bi\u1ec3n bao nhi\u00eau kg n\u01b0\u1edbc l\u00e3 \u0111\u1ec3 \u0111\u01b0\u1ee3c m\u1ed9t lo\u1ea1i dung d\u1ecbch ch\u1ee9a 2% mu\u1ed1i?<\/p>\n<p dir=\"ltr\">C\u00e2u 12: Trong tr\u01b0\u1eddng c\u00f3 68% s\u1ed1 h\u1ecdc sinh bi\u1ebft ti\u1ebfng Nga, 5% bi\u1ebft c\u1ea3 ti\u1ebfng Anh l\u1eabn ti\u1ebfng Nga. S\u1ed1 c\u00f2n l\u1ea1i ch\u1ec9 bi\u1ebft ti\u1ebfng Anh. H\u1ecfi c\u00f3 bao nhi\u00eau ph\u1ea7n tr\u0103m s\u1ed1 h\u1ecdc sinh trong tr\u01b0\u1eddng bi\u1ebft ti\u1ebfng Anh?<\/p>\n<p dir=\"ltr\">C\u00e2u 13: Nh\u00e2n ng\u00e0y 26-3, m\u1ed9t c\u1eeda h\u00e0ng b\u00e1n \u0111\u1ed3 l\u01b0u ni\u1ec7m b\u00e1n h\u1ea1 gi\u00e1 10% so v\u1edbi ng\u00e0y th\u01b0\u1eddng. Tuy v\u1eady h\u1ecd v\u1eabn l\u00e3i 8% so v\u1edbi gi\u00e1 v\u1ed1n. H\u1ecfi ng\u00e0y th\u01b0\u1eddng h\u1ecd l\u00e3i bao nhi\u00eau ph\u1ea7n tr\u0103m so v\u1edbi gi\u00e1 v\u1ed1n?<\/p>\n<p dir=\"ltr\">C\u00e2u 14: M\u1ed9t c\u1eeda h\u00e0ng bu\u00f4n b\u00e1n hoa qu\u1ea3 \u0111\u1eb7t h\u00e0ng 4,5 t\u1ea5n cam v\u1edbi gi\u00e1 18000 \u0111\u1ed3ng m\u1ed9t kil\u00f4gam. Ti\u1ec1n v\u1eadn chuy\u1ec3n l\u00e0 1 600 000 \u0111\u1ed3ng. Gi\u1ea3 s\u1eed 10% s\u1ed1 cam b\u1ecb h\u1ecfng trong qu\u00e1 tr\u00ecnh v\u1eadn chuy\u1ec3n v\u00e0 t\u1ea5t c\u1ea3 s\u1ed1 cam \u0111\u1ec1u b\u00e1n \u0111\u01b0\u1ee3c. H\u00e3y t\u00ednh xem m\u1ed7i kg cam c\u1ea7n b\u00e1n v\u1edbi gi\u00e1 bao nhi\u00eau \u0111\u1ec3 thu l\u00e3i 8%?<\/p>\n<p dir=\"ltr\">C\u00e2u 15: B\u1ed1 mua 2 \u0111\u00f4i gi\u00e0y cho H\u00f9ng nh\u01b0ng \u0111\u1ec1u b\u1ecb nh\u1ecf n\u00ean m\u1eb9 ph\u1ea3i mang b\u00e1n 2 \u0111\u00f4i gi\u00e0y \u0111\u00f3 \u0111i. M\u1ed7i \u0111\u00f4i gi\u00e0y \u0111\u1ec1u b\u00e1n v\u1edbi gi\u00e1 300.000 \u0111\u1ed3ng. Trong \u0111\u00f3 m\u1ed9t \u0111\u00f4i b\u00e1n nhi\u1ec1u h\u01a1n gi\u00e1 mua 20%, \u0111\u00f4i kia b\u00e1n \u00edt h\u01a1n gi\u00e1 mua 20%. H\u1ecfi m\u1eb9 Ti\u1ebfn b\u00e1n \u0111\u01b0\u1ee3c l\u00e3i hay l\u1ed7 bao nhi\u00eau ti\u1ec1n?<\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #c2e0f4\" border=\"1\">\n<tr>\n<td style=\"width: 98.5189%\">\n<p style=\"text-align: center\">GI\u1ea2I PH\u00c1P GI\u00daP CON PH\u00c1T TRI\u1ec2N TO\u00c0N DI\u1ec6N T\u01af DUY V\u00c0 NG\u00d4N NG\u1eee V\u1edaI B\u1ed8 S\u1ea2N PH\u1ea8M TO\u00c1N + TI\u1ebeNG VI\u1ec6T + TI\u1ebeNG ANH V\u1edaI \u01afU \u0110\u00c3I L\u00caN T\u1edaI 50% NGAY H\u00d4M NAY.<\/p>\n<p style=\"text-align: center\">\u00a0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia.monkeyuni.net\/upload\/web\/img\/button_dang-ky-ngay-1.png\" alt=\"\" width=\"200\" height=\"27\"><\/p>\n<\/td>\n<\/tr>\n<\/table>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ung_dung_cong_thuc_tinh_ti_so_phan_tram_vao_thuc_tien\"><\/span>\u1ee8ng d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m v\u00e0o th\u1ef1c ti\u1ec5n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C\u00f4ng th\u1ee9c t\u00ednh t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m l\u00e0 m\u1ed9t c\u00f4ng th\u1ee9c to\u00e1n h\u1ecdc \u0111\u01a1n gi\u1ea3n nh\u01b0ng c\u00f3 th\u1ec3 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong th\u1ef1c ti\u1ec5n. C\u1ee5 th\u1ec3 nh\u01b0:<\/p>\n<ul>\n<li>Trong l\u0129nh v\u1ef1c kinh t\u1ebf &#8211; t\u00e0i ch\u00ednh, t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh to\u00e1n l\u00e3i su\u1ea5t, thu\u1ebf, doanh thu, chi ph\u00ed, l\u1ee3i nhu\u1eadn,&#8230; <em>V\u00ed d\u1ee5: L\u00e3i su\u1ea5t ng\u00e2n h\u00e0ng \u0111\u01b0\u1ee3c t\u00ednh theo t\u1ec9 l\u1ec7 ph\u1ea7n tr\u0103m tr\u00ean s\u1ed1 ti\u1ec1n g\u1eedi.<\/em><\/li>\n<li>Trong l\u0129nh v\u1ef1c gi\u00e1o d\u1ee5c, t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh \u0111i\u1ec3m thi, \u0111i\u1ec3m trung b\u00ecnh, x\u1ebfp lo\u1ea1i h\u1ecdc sinh,&#8230; <em>V\u00ed d\u1ee5: \u0110i\u1ec3m thi c\u1ee7a m\u1ed9t h\u1ecdc sinh \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng t\u1ed5ng s\u1ed1 \u0111i\u1ec3m \u0111\u1ea1t \u0111\u01b0\u1ee3c chia cho t\u1ed5ng s\u1ed1 \u0111i\u1ec3m t\u1ed1i \u0111a.<\/em><\/li>\n<li>Trong l\u0129nh v\u1ef1c y t\u1ebf, t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh t\u1ef7 l\u1ec7 m\u1eafc b\u1ec7nh, t\u1ef7 l\u1ec7 t\u1eed vong,&#8230; <em>V\u00ed d\u1ee5: T\u1ef7 l\u1ec7 m\u1eafc b\u1ec7nh \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng s\u1ed1 ng\u01b0\u1eddi m\u1eafc b\u1ec7nh chia cho t\u1ed5ng s\u1ed1 ng\u01b0\u1eddi trong m\u1ed9t c\u1ed9ng \u0111\u1ed3ng.<\/em><\/li>\n<li>Trong l\u0129nh v\u1ef1c khoa h\u1ecdc, t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh h\u00e0m l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t ch\u1ea5t trong m\u1ed9t h\u1ed7n h\u1ee3p,&#8230; <em>V\u00ed d\u1ee5: H\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc trong m\u1ed9t qu\u1ea3 cam \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng kh\u1ed1i l\u01b0\u1ee3ng n\u01b0\u1edbc chia cho kh\u1ed1i l\u01b0\u1ee3ng t\u1ed5ng th\u1ec3 c\u1ee7a qu\u1ea3 cam.<\/em><\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/p>\n<p dir=\"ltr\">Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng th\u00f4ng tin chia s\u1ebb v\u1ec1 ki\u1ebfn th\u1ee9c t\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m, m\u1ed9t trong nh\u1eefng d\u1ea1ng to\u00e1n c\u01a1 b\u1ea3n trong to\u00e1n h\u1ecdc, c\u0169ng nh\u01b0 t\u00ednh \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n r\u1ea5t cao. V\u1eady n\u00ean, ph\u1ee5 huynh c\u00f3 th\u1ec3 n\u1eafm v\u1eefng nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y \u0111\u1ec3 h\u1ed7 tr\u1ee3 c\u00f4ng vi\u1ec7c, c\u0169ng nh\u01b0 gi\u00fap h\u01b0\u1edbng d\u1eabn con tr\u1ebb h\u1ecdc t\u1eadp v\u00e0 chinh ph\u1ee5c d\u1ea1ng b\u00e0i t\u1eadp n\u00e0y t\u1ed1t h\u01a1n nh\u00e9.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u1ec9 s\u1ed1 ph\u1ea7n tr\u0103m l\u00e0 m\u1ed9t ph\u1ea7n ki\u1ebfn th\u1ee9c to\u00e1n h\u1ecdc m\u00e0 b\u1ea5t k\u1ef3 h\u1ecdc sinh n\u00e3o c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc, l\u00e0m quen v\u00e0 gi\u1ea3i b\u00e0i t\u1eadp. Tuy nhi\u00ean, \u0111\u1ec3 gi\u1ea3i b\u00e0i t\u1eadp \u0111\u00f2i h\u1ecfi h\u1ecdc sinh ph\u1ea3i n\u1eafm r\u00f5 ki\u1ebfn th\u1ee9c c\u00f4ng th\u1ee9c v\u00e0 c\u00e1ch t\u00ednh. V\u1eady n\u00ean, trong n\u1ed9i dung b\u00e0i vi\u1ebft sau&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-14891","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14891","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=14891"}],"version-history":[{"count":1,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14891\/revisions"}],"predecessor-version":[{"id":17853,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14891\/revisions\/17853"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=14891"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=14891"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=14891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}