{"id":7165,"date":"2017-05-08T23:56:34","date_gmt":"2017-05-08T23:56:34","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/prealgebra\/?post_type=chapter&#038;p=7165"},"modified":"2024-04-30T16:36:25","modified_gmt":"2024-04-30T16:36:25","slug":"ratios-and-rate","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/wm-developmentalemporium\/chapter\/ratios-and-rate\/","title":{"raw":"Introduction to Writing Ratios and Calculating Rates","rendered":"Introduction to Writing Ratios and Calculating Rates"},"content":{"raw":"<h2>What you'll learn to do: Write ratios as fractions and calculate unit rates<\/h2>\r\n[caption id=\"attachment_13339\" align=\"aligncenter\" width=\"1000\"]<a href=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/277\/2017\/05\/27210438\/3937471655_709a385638_o.jpg\"><img class=\"wp-image-13339 size-full\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/277\/2017\/05\/27210438\/3937471655_709a385638_o.jpg\" alt=\"Several different kinds of Tillamook cheese in packages of different sizes\" width=\"1000\" height=\"666\" \/><\/a> How can you compare prices on packages of different sizes?[\/caption]\r\n\r\nWhen you go grocery shopping, do you sometimes find it difficult to compare prices when you're choosing between packages of different sizes or quantities of an item? For example, imagine you want to buy a block of cheese. One brand is\u00a0$4.99 for a 16-ounce brick. Another brand is on sale for $6.99 for a 24-ounce brick. Which one is the better deal? To make sure you get the most for your money, you'll need to figure out the price of cheese per ounce so that you can compare equal quantities. In this section, we'll explore ratios and rates, which will help you calculate unit rates and unit prices.\r\n\r\nBefore you get started, take this readiness quiz.\r\n<div class=\"textbox examples\">\r\n<h3>readiness quiz<\/h3>\r\n1)\r\n\r\n[ohm_question]146014[\/ohm_question]\r\n\r\nIf you missed this problem, review this video.\r\n\r\nhttps:\/\/youtu.be\/_2Wk7jXf3Ok\r\n\r\n2)\r\n\r\nDivide: [latex]2.76\\div 11.5[\/latex]\r\n\r\nSolution: [latex]0.24[\/latex]\r\n\r\n3)\r\n\r\n[ohm_question]146100[\/ohm_question]\r\n\r\nIf you missed this problem, review the video below.\r\n\r\nhttps:\/\/youtu.be\/zw7WdhQnXHw\r\n\r\n<\/div>","rendered":"<h2>What you&#8217;ll learn to do: Write ratios as fractions and calculate unit rates<\/h2>\n<div id=\"attachment_13339\" style=\"width: 1010px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/277\/2017\/05\/27210438\/3937471655_709a385638_o.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-13339\" class=\"wp-image-13339 size-full\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/277\/2017\/05\/27210438\/3937471655_709a385638_o.jpg\" alt=\"Several different kinds of Tillamook cheese in packages of different sizes\" width=\"1000\" height=\"666\" \/><\/a><\/p>\n<p id=\"caption-attachment-13339\" class=\"wp-caption-text\">How can you compare prices on packages of different sizes?<\/p>\n<\/div>\n<p>When you go grocery shopping, do you sometimes find it difficult to compare prices when you&#8217;re choosing between packages of different sizes or quantities of an item? For example, imagine you want to buy a block of cheese. One brand is\u00a0$4.99 for a 16-ounce brick. Another brand is on sale for $6.99 for a 24-ounce brick. Which one is the better deal? To make sure you get the most for your money, you&#8217;ll need to figure out the price of cheese per ounce so that you can compare equal quantities. In this section, we&#8217;ll explore ratios and rates, which will help you calculate unit rates and unit prices.<\/p>\n<p>Before you get started, take this readiness quiz.<\/p>\n<div class=\"textbox examples\">\n<h3>readiness quiz<\/h3>\n<p>1)<\/p>\n<p><iframe loading=\"lazy\" id=\"ohm146014\" class=\"resizable\" src=\"https:\/\/ohm.lumenlearning.com\/multiembedq.php?id=146014&theme=oea&iframe_resize_id=ohm146014&show_question_numbers\" width=\"100%\" height=\"150\"><\/iframe><\/p>\n<p>If you missed this problem, review this video.<\/p>\n<p><iframe loading=\"lazy\" id=\"oembed-1\" title=\"Ex 1:  Simplify Fractions\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/_2Wk7jXf3Ok?feature=oembed&#38;rel=0\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>2)<\/p>\n<p>Divide: [latex]2.76\\div 11.5[\/latex]<\/p>\n<p>Solution: [latex]0.24[\/latex]<\/p>\n<p>3)<\/p>\n<p><iframe loading=\"lazy\" id=\"ohm146100\" class=\"resizable\" src=\"https:\/\/ohm.lumenlearning.com\/multiembedq.php?id=146100&theme=oea&iframe_resize_id=ohm146100&show_question_numbers\" width=\"100%\" height=\"150\"><\/iframe><\/p>\n<p>If you missed this problem, review the video below.<\/p>\n<p><iframe loading=\"lazy\" id=\"oembed-2\" title=\"Division of Fractions Using Formal Rules\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/zw7WdhQnXHw?feature=oembed&#38;rel=0\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<\/div>\n\n\t\t\t <section class=\"citations-section\" role=\"contentinfo\">\n\t\t\t <h3>Candela Citations<\/h3>\n\t\t\t\t\t <div>\n\t\t\t\t\t\t <div id=\"citation-list-7165\">\n\t\t\t\t\t\t\t <div class=\"licensing\"><div class=\"license-attribution-dropdown-subheading\">CC licensed content, Shared previously<\/div><ul class=\"citation-list\"><li>Tillamook cheese. <strong>Authored by<\/strong>: goodiesfirst. <strong>Located at<\/strong>: <a target=\"_blank\" href=\"https:\/\/www.flickr.com\/photos\/scaredykat\/3937471655\/\">https:\/\/www.flickr.com\/photos\/scaredykat\/3937471655\/<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><li>Ex 1: Simplify Fractions. <strong>Authored by<\/strong>: James Sousa (Mathispower4u.com). <strong>Located at<\/strong>: <a target=\"_blank\" href=\"https:\/\/youtu.be\/_2Wk7jXf3Ok\">https:\/\/youtu.be\/_2Wk7jXf3Ok<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><li>Division of Fractions Using Formal Rules. <strong>Authored by<\/strong>: James Sousa (Mathispower4u.com). <strong>Located at<\/strong>: <a target=\"_blank\" href=\"https:\/\/youtu.be\/zw7WdhQnXHw\">https:\/\/youtu.be\/zw7WdhQnXHw<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><li>Question ID: 146014, 146100. <strong>Authored by<\/strong>: Lumen Learning. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em>. <strong>License Terms<\/strong>: IMathAS Community License CC-BY + GPL<\/li><\/ul><div class=\"license-attribution-dropdown-subheading\">CC licensed content, Specific attribution<\/div><ul class=\"citation-list\"><li>Prealgebra. <strong>Provided by<\/strong>: OpenStax. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em>. <strong>License Terms<\/strong>: Download for free at http:\/\/cnx.org\/contents\/caa57dab-41c7-455e-bd6f-f443cda5519c@9.757<\/li><\/ul><\/div>\n\t\t\t\t\t\t <\/div>\n\t\t\t\t\t <\/div>\n\t\t\t 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