What percent is X of Y?
Calculator
The calculator needs JavaScript. The tables below give the same numbers for common cases.
How it is worked out
- Divide the part by the whole: 30 ÷ 200 = 0.15.
- Multiply by 100: 0.15 × 100 = 15%.
- Check: 15% of 200 = 30.
| Inputs | Answer |
|---|---|
| 25, 29 | 25 is 86.2069% of 29. |
| 9, 15 | 9 is 60% of 15. |
| 5, 25 | 5 is 20% of 25. |
| 32, 80 | 32 is 40% of 80. |
How to use it
To find what percent one number is of another, divide the part by the whole and multiply by 100. 30 out of 200 is 30 ÷ 200 = 0.15, which is 15%.
Use it for test scores, shares of a budget, how much of a goal is done or what share a number is of a total. The whole goes in the second box. If the part is larger than the whole, the answer is over 100%.
Frequently asked questions
What percent is 5 of 25?
5 ÷ 25 = 0.2, so 5 is 20% of 25.
Can a percent be more than 100?
Yes, when the part is bigger than the whole. 50 is 200% of 25.
How is this different from percent change?
Percent of compares a part with a whole. Percent change compares an old value with a new one; use the percent change calculator for that.
Method: standard arithmetic shown step by step; no outside data is used. Checked 2026-11-12.
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General information only. Results are plain arithmetic on the numbers you enter; check anything important (money, health, school work) against your own records or the official source.