Percentage Calculator
Calculate percentages instantly: what is X% of Y, or what percentage one number is of another. Works both ways — no math degree required.
What is X% of Y?
Result
30
X is what percent of Y?
Percent
15%
Formula
part = (percentage ÷ 100) × wholeHow to use the Percentage Calculator
- 1Enter the percentage you want to apply
- 2Enter the number (the whole)
- 3Read the result instantly — no buttons needed
Frequently Asked Questions
How do I calculate a percentage of a number?
Multiply the number by the percentage and divide by 100. For example, 15% of 200 = 200 × 15 ÷ 100 = 30.
What percentage is X of Y?
Divide X by Y and multiply by 100. For example, 30 is 15% of 200 because 30 ÷ 200 × 100 = 15.