Percentage Calculator
Calculate percentages instantly. Find what percent of a number is, calculate percentage change, find the original value, and more.
What is X% of Y?
How to Use This Percentage Calculator
Choose the type of percentage calculation you need using the tabs above:
- X% of Y — Find a percentage of a number. Example: 25% of 200 = 50.
- X is what % of Y — Find what percentage one number is of another. Example: 50 is 25% of 200.
- Percentage Change — Find the percentage increase or decrease between two values. Example: from 80 to 100 = +25%.
- Find Original Value — Work backwards from a final value to find what it was before a percentage was applied. Example: 120 after +20% → original was 100.
Frequently Asked Questions
Multiply the number by the percentage and divide by 100. For example, 25% of 200 = (25 × 200) / 100 = 50.
Subtract the original from the new value, divide by the original, and multiply by 100. Example: from 80 to 100 → (100 − 80) / 80 × 100 = 25% increase.
Divide the final value by (1 + percentage/100). Example: if 120 is the result after a 20% increase, the original was 120 / 1.20 = 100.
A percentage point is an absolute difference. If something goes from 10% to 15%, it increased by 5 percentage points, but by 50% in relative terms.
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