AFOQT Math Practice

Percents

Percent means "out of 100": 35% = $\frac{35}{100}$ = 0.35. To find a percent of something, turn the percent into a decimal and multiply: 35% of 80 = 0.35 × 80 = 28.

Part of a whole	$part = percent \times whole$ . 15% of 60 = 0.15 × 60 = 9.
What percent?	$percent = part \div whole$ . 18 out of 24 = 0.75 = 75%.
Find the whole	$whole = part \div percent$ . 12 is 30% of what? 12 ÷ 0.3 = 40.
Percent to decimal	Move the point two places left: 7% = 0.07, 125% = 1.25.

More shortcuts are under Math tricks.

AFOQT questions on this: Percent of a number · Finding the whole · Percent of a group · Sales and tax

Drill it

Quick questions on just this skill, to build speed before the practice tests. Type the answers; a clock keeps your time.

Percent of a number 15% of 60, 35% of 80. 35% of 1,000 =
What percent? One number as a percent of another. 350 is what percent of 1,000?
Finding the whole 12 is 30% of what? 350 is 35% of what number?
Percents and decimals 7% is 0.07; 0.35 is 35%. Write $0.08$ as a percent.

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Study guide

Percents