15. Find the percent of increase or decrease. Round to the nearest tenth of a percent where necessary. Purchase a backpack for $32 and sell for $40 A. an increase of 20% C. an increase of 8%
B. an increase of 25% D. a decrease of 20%

16. A department store purchases a dress for $45. To sell the dress to customers, the price is discounted by 20%. Find how much you will pay?
A. $9 B. $54 C. $36 D. $44.80
Problem 17 and 18 use: $700 at 15% annual interest for 6 years. Hint: I=PRT

17. Find the simple interest earned in the account.
A. $12.86 B. $1,750.00 C. $630.00 D. $280.00

18. If your barrow the money, what would be your monthly payments?
A. $18.42 B. $221.67 C. $8.72 D. $105