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Percentage Calculator

Solve common percentage problems: what is X% of Y, X is what % of Y, and percent change.

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Working with percentages

  • X% of Y: multiply — (X ÷ 100) × Y. e.g. 15% of 200 = 30.
  • X is what % of Y: divide — (X ÷ Y) × 100. e.g. 30 is 15% of 200.
  • Percent change: (new − old) ÷ |old| × 100. A rise from 200 to 230 is a 15% increase.