What percentage calculations are supported?

Five: (1) What is X% of Y, (2) X is what percent of Y, (3) Percentage change from X to Y, (4) Percent difference (any direction), (5) Convert fraction to percentage.

Does it show the step-by-step work?

Yes. Each calculation shows the formula and substituted values, so you can verify the answer.

How do I calculate percentage increase?

Use calculator #3 or #4. Formula: ((new - original) / original) × 100. The tool shows whether it's an increase or decrease automatically.

Can I use decimal numbers?

Yes. All inputs accept decimal numbers (e.g. 12.5% of 200.75).

Percentage Calculator

Free online percentage calculator. 5 calculators in one: X% of Y, X is what % of Y, % increase/decrease, percent difference. Step-by-step work shown. No signup.

Percentage Calculator

5 percentage calculators in one. Calculate X% of Y, what % is X of Y, % increase/decrease, and more. Free, no signup.

1. What is X% of Y?

e.g. What is 25% of 200? Answer: 50

Percentage (X)

% of

Value (Y)

2. X is what percent of Y?

e.g. 50 is what % of 200? Answer: 25%

Number (X)

is what % of

Total (Y)

3. Percentage change from X to Y

e.g. % change from 40 to 50 = 25% increase

From (X)

To (Y)

4. Percent difference (any direction)

e.g. 200 → 250 = +25%

Original value

→

New value

5. Convert fraction to percentage

e.g. 80 out of 100 = 80%

From value

out of

Total

How to Use the Percentage Calculator

1Pick the calculation type — "what is X% of Y", "X is what percent of Y", or percentage change.
2Enter the two known values.
3The answer computes instantly with the formula shown.
4Use the increase/decrease tab for discounts, marks and price-change maths.