Calculator Lab
🔍

Percentage Calculator

Find percentages, calculate what percent one number is of another, or determine percentage increase and decrease.

Share:

What is X% of Y?

What is% of?

X is what percent of Y?

is what % of?

Percentage Change

Fromto

About Percentage Calculations

  • X% of Y: Multiply Y by X/100
  • X is what % of Y: Divide X by Y and multiply by 100
  • Percentage change: ((New - Old) / Old) × 100
Advertisement

How to Use This Calculator

  1. Choose the type of calculation you need from the three options
  2. Enter the values in the input fields
  3. Click 'Calculate' to see the result
  4. Use 'What is X% of Y' for finding a percentage of a value
  5. Use 'X is what % of Y' for finding what percentage one value is of another
  6. Use 'Percentage Change' for calculating increase or decrease between values

Formula

1. X% of Y = (X/100) × Y 2. X is what % of Y = (X/Y) × 100 3. Percentage Change = ((New - Old) / Old) × 100

Frequently Asked Questions

How do I calculate a percentage of a number?▼
To find X% of a number Y, convert the percentage to a decimal by dividing by 100, then multiply by Y. For example, 25% of 80 = (25/100) × 80 = 0.25 × 80 = 20.
How do I calculate what percentage one number is of another?▼
Divide the first number by the second number, then multiply by 100. For example, to find what percent 15 is of 60: (15/60) × 100 = 25%.
How do I calculate percentage increase or decrease?▼
Use the formula: ((New Value - Old Value) / Old Value) × 100. A positive result means increase, negative means decrease. For example, from 50 to 75: ((75-50)/50) × 100 = 50% increase.
What's the difference between percentage and percentile?▼
A percentage is a fraction of 100, while a percentile indicates a value below which a certain percentage of data falls. For example, scoring in the 90th percentile means you scored higher than 90% of test-takers.
How do I add or subtract a percentage from a number?▼
To add X% to a number, multiply by (1 + X/100). To subtract, multiply by (1 - X/100). For example, adding 20% to 50: 50 × 1.20 = 60. Subtracting 20% from 50: 50 × 0.80 = 40.
Advertisement