Percentage Calculator

Find what a percentage of a number is (X% of Y).

Result 30

Value minus result 120

Formula: result = percent ÷ 100 × value

Step-by-step with your numbers:

1. Values used:

2. Percentage = 20 %

3. Of value = 150

5. Result = (20 / 100) x 150 = 0.2 x 150 = 30

6. Value minus result = 120

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Quickly calculate a percentage of any number — for tips, discounts, taxes and more.

The math behind it

'X percent of Y' means X ÷ 100 × Y. 'Percent' literally means 'per hundred'.

20% of 150 = 0.20 × 150 = 30.

How do I find what percent A is of B?

Divide A by B and multiply by 100: (A ÷ B) × 100.