How do I calculate a percentage?

Percentage = (part / whole) × 100. For example, to find what percentage 30 is of 200: (30 / 200) × 100 = 15%.

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Percentage Calculator

Calculate percentages easily with three modes: find what X% of Y is, find what percentage X is of Y, or find the total when X is Y% of it.

Percentage (X%)

Value (Y)

A percentage calculator helps you solve the three most common percentage problems without doing the math manually.

Find a percentage of a number. Formula: Result = (X / 100) × Y Example: What is 15% of 200? → 30

Find what percentage one number is of another. Formula: Percentage = (X / Y) × 100 Example: 30 is what % of 200? → 15%

Find the total when you know a part and its percentage. Formula: Total = (X / Y) × 100 Example: 30 is 15% of what? → 200