7th Grade Math Practice Test

A test score increases from 70 to 84. What is the percent increase?

20% 15% 25% 10%

Correct Answer:

20%

Explanation:

Percent change is found by comparing the amount of increase to the original value. To find the percent increase from 70 to 84, first find the increase: 84 − 70 = 14. Then divide by the original amount: 14 ÷ 70 = 0.2. Convert to a percent: 0.2 × 100 = 20%. So the score increased by 20%. You can check by applying the percent: 70 × 1.20 = 84. For reference, 15% would give 70 × 1.15 = 80.5, 25% would give 87.5, and 10% would give 77, which don’t match.

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