Quarter 3 Exam Review

Percent Equation

Write an equation for each problem. Then solve. Round to the nearest tenth if necessary.

15 is what percent of 36?

45% of what number is 63?

Find 38% of 23.

What percent of 56 is 49?

Percent of Change

Find each percent of change. Round to the nearest whole percent if necessary. State whether the percent of change is an increase or decrease.

original: $100

new: $50

original: $110

new: $85

original: 15

new: 26.4

original: 16

new: 96

Discount, Sales Tax, Tip 

Find the total cost or sale price to the nearest cent.

$27 amusement park ticket; 10% discount

$1,700 lawn tractor; 7 1/4% sales tax

$73.25 skateboard; 5% sales tax

$5.50 box of chocolates; 30% discount

Simple Interest

Find the interest earned to the nearest cent for each principal, interest rate, and time.

$2,500, 4.5%, 2 years

$58.50, 6%, 1 year

$700, 3.85%, 3 months

$1,225, 9%, 21 months