taptools/Percentage Calculator

Percentage Calculator

Calculate percentages instantly. Free, no signup required.

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Frequently asked questions

How do I calculate a percentage of a number?

To find X% of Y, multiply Y by X and divide by 100. For example, 20% of 500 = 500 × 20 / 100 = 100. Our calculator does this instantly for you.

How do I calculate percentage change?

Percentage change = ((New Value - Old Value) / Old Value) × 100. A positive result means an increase, negative means a decrease.

How do I find what percentage one number is of another?

Divide the first number by the second and multiply by 100. For example, 25 is what percent of 200? = (25 / 200) × 100 = 12.5%.

How do I calculate percentage increase or decrease?

For increase: New Value = Original × (1 + Percentage/100). For decrease: New Value = Original × (1 - Percentage/100).