{"id":277034,"date":"2019-03-18T05:22:20","date_gmt":"2019-03-18T08:22:20","guid":{"rendered":"http:\/\/acaopopular.net\/jornal\/?p=277034"},"modified":"2019-03-18T05:22:20","modified_gmt":"2019-03-18T08:22:20","slug":"o-truque-matematico-que-ajuda-a-calcular-porcentagem-e-nao-se-aprende-na-escola","status":"publish","type":"post","link":"https:\/\/acaopopular.net\/jornal\/o-truque-matematico-que-ajuda-a-calcular-porcentagem-e-nao-se-aprende-na-escola\/","title":{"rendered":"O truque matem\u00e1tico que\u00a0ajuda a calcular porcentagem (e n\u00e3o se aprende na escola)"},"content":{"rendered":"<h1 class=\"story-body__h1\" style=\"text-align: justify;\"><\/h1>\n<div class=\"with-extracted-share-icons\" style=\"text-align: justify;\">\n<div class=\"story-body__mini-info-list-and-share\">\n<div class=\"story-body__mini-info-list-and-share-row\">\n<div class=\"mini-info-list-wrap\">\n<p>&nbsp;<\/p>\n<\/div>\n<div class=\"share-tools--no-event-tag\">\n<div id=\"comp-pattern-library\" class=\"distinct-component-group container-twite\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"story-body__inner\">\n<figure class=\"media-landscape has-caption full-width lead\" style=\"text-align: justify;\"><span class=\"image-and-copyright-container\"><img loading=\"lazy\" decoding=\"async\" class=\"js-image-replace\" src=\"https:\/\/ichef.bbci.co.uk\/news\/660\/cpsprodpb\/15A35\/production\/_105992688_gettyimages-898704212.jpg\" alt=\"F\u00f3rmulas matem\u00e1ticas\" width=\"976\" height=\"549\" data-highest-encountered-width=\"660\" \/><\/span>Com esse truque, calcular porcentagens ficou muito mais f\u00e1cil<\/figure>\n<p class=\"story-body__introduction\" style=\"text-align: justify;\">Voc\u00ea tamb\u00e9m corre para a calculadora toda vez que precisa fazer conta de porcentagem?<\/p>\n<p style=\"text-align: justify;\">O redator publicit\u00e1rio Ben Stephens publicou no Twitter um truque que voc\u00ea gostaria de ter conhecido a vida toda. E, n\u00e3o por acaso, se tornou viral.<\/p>\n<div class=\"social-embed\" style=\"text-align: justify;\">\n<div class=\"social-embed-post social-embed-fallbacktwitter embed-image-wrap\">\n<figure class=\"media-landscape full-width embed-screenshot-js\"><span class=\"image-and-copyright-container\"><img loading=\"lazy\" decoding=\"async\" class=\"responsive-image__img js-image-replace\" src=\"https:\/\/ichef.bbci.co.uk\/news\/485\/socialembed\/https:\/\/twitter.com\/stephens_ben\/status\/1102167046115262466~\/portuguese\/geral-47551716\" alt=\"Twitter post de @stephens_ben: Fascinating little life hack, for doing percentages x% of y = y% of xSo, for example, if you needed to work out 4% of 75 in your head, just flip it and and do 75% of 4, which is easier.\" width=\"465\" height=\"294\" data-highest-encountered-width=\"485\" \/><span class=\"off-screen\">Direitos da imagem @stephens_ben<\/span><span class=\"story-image-copyright\" aria-hidden=\"true\">@STEPHENS_BEN<\/span><\/span><\/figure>\n<\/div>\n<\/div>\n<p style=\"text-align: justify;\">A f\u00f3rmula que ele sugere para calcular porcentagens \u00e9 a seguinte: x% de y = y% de x.<\/p>\n<p style=\"text-align: justify;\">Assim, seguindo o exemplo de Stephens, 4% de 75 \u00e9 igual a 75% de 4, com a diferen\u00e7a de que invertendo os n\u00fameros \u00e9 muito mais f\u00e1cil de calcular.<\/p>\n<p style=\"text-align: justify;\">A resposta, nesse caso, \u00e9 3.<\/p>\n<figure class=\"media-landscape has-caption full-width\" style=\"text-align: justify;\"><span class=\"image-and-copyright-container\"><img loading=\"lazy\" decoding=\"async\" class=\"responsive-image__img js-image-replace\" src=\"https:\/\/ichef.bbci.co.uk\/news\/624\/cpsprodpb\/259D\/production\/_105992690_gettyimages-947445504.jpg\" alt=\"S\u00edmbolo de porcentagem\" width=\"976\" height=\"549\" data-highest-encountered-width=\"624\" \/><\/span>Muitos usu\u00e1rios agradeceram a Stephens por compartilhar o truque matem\u00e1tico<\/figure>\n<p style=\"text-align: justify;\">Vamos fazer outro teste.<\/p>\n<p style=\"text-align: justify;\">Se voc\u00ea precisa saber quanto \u00e9 18% de 50, a princ\u00edpio n\u00e3o parece t\u00e3o simples calcular rapidamente de cabe\u00e7a.<\/p>\n<p style=\"text-align: justify;\">Mas aplicando a f\u00f3rmula sugerida por Stephens, sabemos que 18% de 50 \u00e9 igual a 50% de 18.<\/p>\n<p style=\"text-align: justify;\">E 50% de 18 \u00e9 9, muito mais f\u00e1cil de calcular, certo?<\/p>\n<p style=\"text-align: justify;\">O truque de Stephens j\u00e1 foi retuitado quase 7.500 vezes e teve mais de 20 mil curtidas.<\/p>\n<p style=\"text-align: justify;\">Em outra publica\u00e7\u00e3o, ele pr\u00f3prio afirmou que n\u00e3o esperava tamanha rea\u00e7\u00e3o:<\/p>\n<p style=\"text-align: justify;\">&#8220;Cl\u00e1ssico. Eu passo anos tuitando sobre coisas importantes, sobre Trump e Brexit, e quando publico um tu\u00edte sobre matem\u00e1tica (t\u00f3pico sobre o qual eu nunca tinha tuitado antes) a internet vai \u00e0 loucura&#8221;.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A f\u00f3rmula que ele sugere para calcular porcentagens \u00e9 a seguinte: x% de y = y% de x.Assim, seguindo o exemplo de Stephens, 4% de 75 \u00e9 igual a 75% de 4, com a diferen\u00e7a de que invertendo os n\u00fameros \u00e9 muito mais f\u00e1cil de calcular.<\/p>\n","protected":false},"author":5,"featured_media":277035,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2}},"categories":[3,6],"tags":[],"class_list":["post-277034","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cultura","category-municipios"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/acaopopular.net\/jornal\/wp-content\/uploads\/2019\/03\/sala-de-aula-quadro.jpg","_links":{"self":[{"href":"https:\/\/acaopopular.net\/jornal\/wp-json\/wp\/v2\/posts\/277034","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/acaopopular.net\/jornal\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/acaopopular.net\/jornal\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/acaopopular.net\/jornal\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/acaopopular.net\/jornal\/wp-json\/wp\/v2\/comments?post=277034"}],"version-history":[{"count":0,"href":"https:\/\/acaopopular.net\/jornal\/wp-json\/wp\/v2\/posts\/277034\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/acaopopular.net\/jornal\/wp-json\/wp\/v2\/media\/277035"}],"wp:attachment":[{"href":"https:\/\/acaopopular.net\/jornal\/wp-json\/wp\/v2\/media?parent=277034"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/acaopopular.net\/jornal\/wp-json\/wp\/v2\/categories?post=277034"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/acaopopular.net\/jornal\/wp-json\/wp\/v2\/tags?post=277034"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}