Percentage Calculator
Four percentage calculators in one — find percentages, percentage change, what percent one number is of another, and reverse percentage.
Type 1
What is X% of Y?
Formula
Type 2
X is what % of Y?
Formula
Type 3
Percentage Change
Formula
Type 4
Find the Original (Reverse %)
Formula
Percentage Formulas
X% of Y = (X ÷ 100) × Y · X is what % of Y = (X ÷ Y) × 100 · % Change = ((New−Old) ÷ |Old|) × 100
Common Examples
15% of 200 = 30 · 30 is 25% of 120 · 80 to 100 = 25% increase · 20% off $80 = $64
Frequently Asked Questions
What is 20% of 150?
20% of 150 = 30. Formula: (20 ÷ 100) × 150 = 0.2 × 150 = 30.
45 is what percent of 180?
45 is 25% of 180. Formula: (45 ÷ 180) × 100 = 0.25 × 100 = 25%.
What is the percent increase from 80 to 100?
The percent increase is 25%. Formula: ((100 − 80) ÷ 80) × 100 = (20 ÷ 80) × 100 = 25%.