Percentage Calculator – Free & Client-Side

Fast, versatile 3-way utility for everyday percentage calculations: find X% of Y, calculate what percentage X is of Y, or determine the percentage change between two values.

Mathematical Formula

1. P = (X / 100) × Y; 2. P% = (X / Y) × 100; 3. % Change = ((New - Old) / Old) × 100.

Frequently Asked Questions

How do I calculate a percentage of a number?
Convert the percentage into a decimal by dividing by 100, then multiply by the total number. For example, 15% of 240 is 0.15 × 240 = 36.
How do you find what percentage one number is of another?
Divide the part by the whole and multiply by 100. For example, 35 out of 140 is (35 / 140) × 100 = 25%.

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