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Niche Work Tools

Percentage Calculator

Find X% of a number, or find what percent one number is of another.

In “X% of Y”, X is the percentage. In “X is what % of Y”, X is the part.

In “X% of Y”, Y is the number you take the percentage of. In “X is what % of Y”, Y is the whole.

Choose what you want to find, enter X and Y, then press Calculate. “X% of Y” gives a value; “X is what % of Y” gives a percentage.

How to use

  1. Choose what you want to find.
  2. Enter X and Y.
  3. Press Calculate or Enter.
  4. Copy the result if you need it.

Worked example

What is 15% of 200?

What do you want to find?:
X% of Y
X:
15
Y:
200

Result: 30

Frequently asked questions

How do I calculate X% of a number?

Multiply the number by X and divide by 100. For example, 15 × 200 ÷ 100 = 30, so 15% of 200 is 30.

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

Multiply the first number by 100 and divide by the second. For example, 25 × 100 ÷ 80 = 31.25, so 25 is 31.25% of 80.

Why can't Y be zero?

In “X is what % of Y” the calculator divides by Y, and dividing by zero has no answer. “X% of Y” works with Y = 0 and gives 0.