1. Find the percent of each number. 1. 25% of 80 2. 4% of 110 3. 170% of 86 4. 13% of 120 4.4 20 146.2 15.6 2/18/11 Percent Today’s Plan: -Percent lesson -Correct Homework -Active Expressions LT: I will use proportions to solve percent problems. % 100 = is of

2. Course 2 6-4 Solving Equations Containing Percents Percent is of 68.75% 16.5 is what percent of 24 hours? % 100 = is of x 100 16.5 24 =

3. Course 2 6-4 Solving Equations Containing Percents A. 25 is what percent of 40? 100 = 62.5% 25 is 62.5% of 40. % 100 = is of x25 40

4. Course 2 6-4 Solving Equations Containing Percents B. 15 is 25% of what number? x = 60 15 is 25% of 60. Write a proportion. % 100 = is of 100 = 2515 x

5. Correct Assignment: Page 314 #1-26 2/17/11 Percent Today’s Plan: -Test Results -Find percent of a number LT: I will use proportions to solve percent problems. % 100 = is of

6. Active Expressions % 100 = is of 2/17/11 Percent Today’s Plan: -Test Results -Find percent of a number LT: I will use proportions to solve percent problems.

7. Solve. Try This: Example 1A Course 2 6-4 Solving Equations Containing Percents A. 10 is what percent of 50? n 100 = 10 50 n = 20 10 is 20% of 50. Write a proportion.

8. Solve. Try This: Example 1B Course 2 6-4 Solving Equations Containing Percents B. 8 is 40% of what number? 40 100 = 8n8n n = 20 8 is 40% of 20. Write a proportion.

9. Lesson Quiz 1. 21 is 42% of what number? 2. 73 is what percent of 292? 3. 112% of what number is 84? 4. 13.4 is what percent of 1340? 5. An ad shows a DVD player on sale for 75% of its original price. If its original price was $242, what is the sale price? 25% 50 Insert Lesson Title Here 75 1% Course 2 6-4 Solving Equations Containing Percents $181.50

10. Course 2 6-4 Solving Equations Containing Percents Proportion Method Equation Method n 100 = 16.5 24 Part Whole Part Whole What percent of 24 is 16.5? n · 24 = 100 · 16.5 24n = 1,650 n = 68.75 68.75% n · 24 = 16.5 n = 0.6875 n = 68.75%