1. 2-7 Notes for Algebra 1
Percent of Change

2. Percent of Change
Is the ratio of change in an amount to the original amount expressed as a percent.

3. Percent of Increase
A percent of change when the new number is greater than the original number.

4. Percent of Decrease
A percent of change when the new number is less than the original number.

5. Example 1 pg. 119 Percent of Change
Determine whether each percent of change is a percent of increase or a percent of decrease. Then find the percent of change. 1.) Original: 32 2.) Original: 20 New: 40 New: 4

6. Example 1 pg. 119 Percent of Change
Determine whether each percent of change is a percent of increase or a percent of decrease. Then find the percent of change. 1.) Original: 32 2.) Original: 20 New: 40 New: 4 percent of increase; 25% percent of decrease; 80%

7. Example 2 pg. 120 Real World Example
2.) SALES The price a used-book store pays to buy a book is $5. The store sells the book for 28% above the price that it pays for the book. What is the selling price of the book?

8. Example 2 pg. 120 Real World Example
2.) SALES The price a used-book store pays to buy a book is $5. The store sells the book for 28% above the price that it pays for the book. What is the selling price of the book? $6.40

9. Example 3 pg Sales Tax
1.) SALES TAX A meal for two at a restaurant costs $ If the sales tax is 5%, what is the total price of the meal?

10. Example 3 pg Sales Tax
1.) SALES TAX A meal for two at a restaurant costs $ If the sales tax is 5%, what is the total price of the meal? $34.39

11. Example 4 pg Discounts
1.) DISCOUNT A dog toy is on sale for 20% off the original price. If the original price of the toy is $3.80, what is the discounted price?

12. Example 4 pg Discounts
1.) DISCOUNT A dog toy is on sale for 20% off the original price. If the original price of the toy is $3.80, what is the discounted price? $3.04

13. 2-7 pg o, 36-44, 51-72(x3)