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Percentage Calculator
Percent-of, what-percent and percent-change questions, answered instantly.
Enter two numbers to see the percentage result.
Formula
Part ÷ Whole × 100 = percentage · X% of N = X ÷ 100 × N · Change = (new − old) ÷ old × 100
How to calculate
- 1What is X% of N? Multiply N by X ÷ 100.
- 2X is what % of N? Divide X by N and multiply by 100.
- 3Percent change? Divide the difference by the original and multiply by 100.
- 4Increase or decrease N by X%? Multiply N by (1 ± X ÷ 100).
How to use this calculator
- 1Choose the type of percentage question you need to answer.
- 2Enter the two known numbers.
- 3The answer appears instantly with the full working shown.
- 4Switch modes to answer follow-up questions in place.
Examples
Discount example
A $80 jacket at 25% off saves 80 × 0.25 = $20 — you pay $60.
Change example
A rise from 40 to 50 is (50 − 40) ÷ 40 × 100 = a 25% increase.
Common questions
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