Percentage calculator

Three quick percentage calculations in one place.

Percentage calculator

Works offline

What is X% of Y? (first = X, second = Y)

First number

Second number

Result

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X is what percent of Y?

First number

Second number

Result

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Percentage change from old to new

First number

Second number

Result

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Formulas

X% of Y = X × Y ÷ 100
X is what percent of Y = X ÷ Y × 100
Change % = (new − old) ÷ old × 100

Frequently asked questions

How do I find 15% of a number?

Multiply the number by 15 and divide by 100. Put 15 in the first box and the number in the second.

How do I calculate a discount?

Find the discount as X% of the price, then subtract it. A 20% discount on ₹2,500 is ₹500, so you pay ₹2,000.

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Page reviewed 25 October 2026.