1. Section 6-4: Solving Percent Problems Review Lessons 7.1 and 7.2: Rates, Ratios, and Proportions Standards: AF 4.1 and NS 1.3 Objectives: Find Percents. Find the base or part of the base.

2. Rate and Ratio Review Ratios 1)5 inches to 2 feet 2)5 : 20 peopleRates 1)6 gallons for $6.75 2)Sold 120 rings in 8 h

3. Proportion Review

4. Percent Problems Use proportions to solve most percent problems.

5. Percent Problems: Part of the Base What is 16% of 50?What is 16% of 50? You could change the percent to a decimal and multiply. You could set up a proportion:

6. Percent Problems: Part of the base 1) What is 24% of 50?

7. Percent Problems: Base Finding the BaseFinding the Base Do the same thing, but solve for b. 90 is 75% of what number?90 is 75% of what number?

8. Percent Problems: Base 2) 66 is 120% of what number?

9. Percent Problems: Percent What if you don’t know the percent? Well, you can use the same proportion, but solve for the percent. 17 is what percent of 20?17 is what percent of 20?

10. Percent Problems: Percent Find the percent. 1)21 is what percent of 30? 2)On a 50 point quiz, you received 48 points. What percent did you receive? 3) On a 40 point quiz, you received 38 points plus 6 bonus points. What is the percent?