What is X% of Y?
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A is what percent of B?
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% increase / decrease
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How to calculate percentages (with examples)
Find X% of Y: multiply Y by X and divide by 100. Example: 18% of 250 = 250 × 18 ÷ 100 = 45. What percent is A of B: divide A by B and multiply by 100. Example: 20 is what percent of 400? 20 ÷ 400 × 100 = 5%. Percent change: ((new − old) ÷ old) × 100. Example: from 80 to 92 is ((92−80) ÷ 80) × 100 = 15% increase.Common questions
- How do I convert decimals and fractions to percentages?
- What’s the difference between percentage points and percent?
- How do I calculate tip, discount, tax, and interest with percentages?