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Percentage calculator

Five quick percentage calculators in one place. Results update as you type.

What is % of ?
is what % of ?
From to is
Add % to =
Take % off =

Percentage formulas

  • X% of Y = X ÷ 100 × Y
  • X is what % of Y = X ÷ Y × 100
  • % change = (new − old) ÷ old × 100
  • Add X% = Y × (1 + X ÷ 100) · Take X% off = Y × (1 − X ÷ 100)

Questions

How do I calculate a discount?

Use “Take X% off”: 25% off 1000 is 750.