Finding a Percent of a NumberATI TEAS 7 cheat sheet

Is over of, times 100

9 key facts 5 practice questions Reviewed Oct 2026

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The Setup

part / whole = percent / 100
'Of' means multiply; 'is' means equals
20% of 80 → 0.20 × 80 = 16

Convert

Percent → decimal: move the point two places left (45% = 0.45)
Decimal → percent: move two places right
Percent → fraction: put it over 100, then simplify

Finding The Whole

15 is 25% of what? → 15 / 0.25 = 60
Divide by the decimal, do not multiply

Benchmarks

10% = move the decimal one place; 5% = half of that; 1% = two places

Key takeaway

Is over of, times 100

Before you read

Test yourself first: 5 questions

Question 1 of 5

A number increased by 15 equals 40. What is the number?

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