Calculators tool

Percentage Calculator

X% of Y, percentage change, and what percent X is of Y.

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% change fromto

About this tool

This percentage calculator solves the three most common percentage questions: what is X% of Y, X is what percent of Y, and the percentage change from one value to another.

How to use Percentage Calculator

  1. Pick the calculator row you need.
  2. Enter the two numbers.
  3. The answer updates instantly.

Questions people ask

How do I calculate percentage increase?

Subtract the old value from the new value, divide by the old value, then multiply by 100.

How do I find marks percentage?

Use “X is what % of Y”: enter marks obtained as X and total marks as Y.

Is a 50% rise followed by a 50% fall back to the start?

No. 100 becomes 150, and 50% of 150 is 75, so you end at 75.

Guides for Percentage Calculator

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