1. Grade Lesson 14

6. Notes Lesson 15 Percent of Change

7. Objective: Percent of Change _______________________ – is a ratio that compares the change in quantity to the original amount. Amount of change original amount When the new amount is greater than the original, the percent of change is a percent of _______________. When the new amount is less than the original, the percent of change is a percent of _______________.

8. Find the percent of change if the original cost was $50 and the new cost is $60. Is it an increase or decrease?

9. Find the percent of change if the original cost was $5 and the new cost is $1. Is it an increase or decrease?

10. Find the selling price The store’s cost plus the markup equals the selling price. Store Cost + Markup = Selling Price c + %●c = sp The bookstore buys a synch sack for $2 and marks it up 250%, how much do they sell them for? c + %●c = sp 2 + 2.50 ● 2 = sp

11. Discount = (% of decrease) ● (Regular Price) Regular Price – Discount = Sale Price c – % ● c = sp The Gap is having a 40% off sale on their winter clothes. How much would you pay if a jackets regular cost was $50? c – % ● c = sp

12. Find the sale price of each to the nearest cent. Shirt: $39.95, 25% off c – % ● c = sp