📊 Percentage Calculator — % of Number, Change & Difference

All three percentage calculations — in one place.

Three types of percentage calculations: X% of Y, X is what % of Y, and percentage increase/decrease.

How to Use?

  1. Choose the calculation type.
  2. Enter values for X and Y.
  3. Press Calculate.

Formulas

X% of Y = (X ÷ 100) × Y
X is what % of Y = (X ÷ Y) × 100
% change = ((Y − X) ÷ |X|) × 100

Frequently Asked Questions

What is 15% of 200?
30 — (15 ÷ 100) × 200.
What percent of 200 is 50?
25%.
How to find percentage increase?
(New value − Old value) ÷ Old value × 100.

Last updated: 30 September 2026 · Category: Calculators