Name ________________________ Double Number Lines/Proportions Yesterday you learned how to solve percent problems using tape diagrams. Let’s review that concept here. → use a tape diagram to find the missing values: a. 30% of 40 = b. 90% of 500 = A similar method is to use a double number line to help solve a percent problem. For example: 80% of 50 people = 40 people ____________________________________ 0% 100% ____________________________________ 0 people 50 people Use this method to answer the following questions: 75% of 240 = 30% of 90 = 1. 2. 3. 60% of 200 = 4. 15% of 20 = 5. 200 people wanted to be in the Mathcounts WIN group, only 40% of these people got in. How many people have Mathcounts for WIN? 6. Carly has 35 pens in How many do work? her pencil case and 20% don’t work.
Name ________________________ Double Number Lines/Proportions Yesterday you learned how to solve percent problems using tape diagrams. Let’s review that concept here. → use a tape diagram to find the missing values: a. 30% of 40 = b. 90% of 500 = A similar method is to use a double number line to help solve a percent problem. For example: 80% of 50 people = 40 people 0% ____________________________________ 100% 0 people ____________________________________ 50 people Use this method to answer the following questions: 1. 75% of 240 = 2. 30% of 90 = 3. 60% of 200 = 4. 15% of 20 = 5. 200 people wanted to be in the Mathcounts WIN group, only 40% of these people got in. How many people have Mathcounts for WIN? 6. Carly has 35 pens in her pencil case and 20% don’t work. How many do work?