Percentage Calculator

Calculate percentages, percentage increases, decreases, and differences with our comprehensive percentage calculator. Perfect for business, education, and everyday calculations.

Calculate Percentage of a Number

What is % of ?
Result
50
25% of 200 is 50

Calculation Steps:

1. Convert percentage to decimal: 25% = 25 ÷ 100 = 0.25
2. Multiply: 0.25 × 200 = 50

Percentage Increase or Decrease

Use positive numbers for increase, negative for decrease
New Value
120
20% increase from 100
Original Value
100
Change Amount
+20

Calculation Steps:

1. Calculate change: 100 × (20 ÷ 100) = 20
2. Add to original: 100 + 20 = 120

Percentage Difference Between Two Numbers

Percentage Difference
22.22%
Between 80 and 100
Absolute Difference
20
Average Value
90

Calculation Steps:

1. Find absolute difference: |100 - 80| = 20
2. Find average: (100 + 80) ÷ 2 = 90
3. Calculate percentage: (20 ÷ 90) × 100 = 22.22%

Percentage Change from Old to New Value

Percentage Change
+50%
From 50 to 75
Change Type
Increase
Absolute Change
25

Calculation Steps:

1. Find change: 75 - 50 = 25
2. Divide by original: 25 ÷ 50 = 0.5
3. Convert to percentage: 0.5 × 100 = 50%

Percentage Calculation Guide

Basic Percentage

To find what percentage one number is of another, divide the first number by the second and multiply by 100. Formula: (Part ÷ Whole) × 100

Percentage Change

Percentage change shows the relative change between old and new values. Formula: ((New - Old) ÷ Old) × 100. Positive values indicate increase.

Common Uses

  • Sales tax and discounts
  • Grade calculations
  • Financial analysis
  • Statistical comparisons