Percentage Calculator

Calculate percentages, increases, decreases, and more.

What is X% of Y?
X is what % of Y?
Percentage Increase
Percentage Decrease

How to Calculate Percentages

Percentages are a way to express a number as a fraction of 100. Here are some common percentage calculations:

Basic Percentage Formula

Percentage = (Part / Whole) × 100

Examples:

  • What is 20% of 100? Answer: 20
  • 25 is what % of 200? Answer: 12.5%
  • Increase from 50 to 75: 50% increase
  • Decrease from 100 to 80: 20% decrease