PPT-Year 9: Ratio & Proportion

Dr J Frost jfrosttiffinkingstonschuk wwwdrfrostmathscom Last modified 3 rd September 2015 The ratio of males to females at a party is 35 There are twelve more females than males How many people are at the party. SPI 6.1.1 Predictions & Conjectures. SPI 6.2.6 Rates & Percents. What is a proportion?. A . proportion. is 2 equivalent ratios.. . Example. : . 6 . = . 3. 20 10. What is a ratio?. A . Presented by: . Nai. 10-4. . Omar 10-4. Wal-Mart Stores Inc. 2011-2012. Wal-Mart Store Inc.. Year 1. Year 2. Gross Profit Ratio. 25.34%. 25.01%. Net Profit Ratio. 3.88%. 3.51%. Ratio . A ratio is the comparison of two numbers by division.. A classroom has 16 boys and 12 girls. . Also written as . 16 boys. , . 16:12 or 16 to 12. 12 girls. Generally, ratios are in lowest terms:. Jessica Johnson, Pharm. D.. TOPICS. Percent Concentrations. Ratio Concentrations. Determining # of tabs/caps needed to reformulate into a liquid. Recipes. Enlarging. Reducing. PERCENT CONCENTRATIONS. Ratios. Comparison of two items/objects. Written one of 3 ways. As a fraction. With : (colon). . using word “to”. When writing a ratio. First thing you talk about is the numerator. Second thing you talk about is the denominator. Scale & . The Golden Mean. Scale vs. . Proportion. Scale . = Size. Proportion. = relative size, the size of an object as measured in comparison to another object or against some mental norm or standard. compares two things. . It can compare part to part, a part to the whole, or the whole to a part.. The word “to” compares the two terms in a ratio. . You can write a ratio three different ways.. A professional development program to help teachers better understand the mathematical reasoning needed for ratio, proportion, and proportional reasoning.. To understand the importance and significance of ratio, proportion, and proportional reasoning in the middle grades mathematics curriculum.. or obese? . 1. 1 in 3. 1 in 4. 1 in 5. 1 in 6 . Q1: What proportion of 4 – 5 year olds in London are overweight . or obese? . 2. 1 in 3. 1 in 4. 1 in 5. 1 in 6 . Rates of childhood obesity have increased considerably in recent years, and London now has higher rates of childhood obesity than other similar global cities. . . Problem-Solving. Pupils’ Version. L3. L4. to. Revising Ratio and Proportion .. What Will You Learn ?. Never heard of . ratio. before? . How exactly do you keep numbers. . in proportion. ?. Proportion – Learning Outcomes Express quantities as proportions of each other using fractions, decimals, ratios, and percentages. Divide quantities into a given proportion. Express errors as a proportion. Adapted from a WORKSHOP prepared for the Rhode Island Department of Education by Kristina Sparfven The Rigors of Ratio and Proportional Reasoning in the Common Core State Standards Agenda Examine the progression of ratio and proportion in the middle grades. Gender-based Indicators in Human Development Development Research IGIDR General Arun Kumar Vaidya Marg Goregaon E Mumbai-400065 INDIA Emails ment Measure are two gender-based indicators provided by t Prof.P.A.Navale. Dept. of Commerce. . Proportion. Meaning:. An equality of two ratios is called a Proportion. Four quantities are said to be in proportion if a: b = c: d (also written as a:b :: c:d)..