Percentage Calculator

Calculate percentages, increases, decreases, and more.

What is X% of Y?

What is% of?

X is what % of Y?

is what % of?

Percentage Change

Fromto

How to Do It Manually

Percentages express a fraction of 100. To find what percent one number is of another, divide the part by the whole and multiply by 100.

Percentage = (Part ÷ Whole) × 100
  1. Divide the part by the whole (e.g. 30 ÷ 200 = 0.15).
  2. Multiply by 100 to convert to a percentage (0.15 × 100 = 15%).
  3. To find a percentage of a number: multiply the number by the percentage then divide by 100.

Frequently Asked Questions

How do I calculate a percentage increase?

Percentage Increase = ((New Value − Old Value) ÷ Old Value) × 100.

How do I find X% of Y?

Multiply Y by X and divide by 100. Example: 20% of 150 = (20 × 150) ÷ 100 = 30.