Percentage Calculator

Calculate percentages, percentage change, and percentage of amounts

What is X% of Y?

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X is what % of Y?

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Percentage Change

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Examples & Tips

Common Examples

  • What is 20% of 150? = 30
  • 50 is what % of 200? = 25%
  • Change from 100 to 120? = +20% increase
  • Change from 200 to 150? = -25% decrease

Percentage Formulas

X% of Y = (X/100) × Y

Example: 15% of 200 = (15/100) × 200 = 30

X is Z% of Y → Z = (X/Y) × 100

Example: 25 is what % of 200? → (25/200) × 100 = 12.5%

Percentage Change = ((New - Old)/Old) × 100

Example: Change from 80 to 100 = ((100-80)/80) × 100 = +25%