Percentage Calculator

Calculate percentages, increase, decrease, and solve percentage problems

Multiple Calculation Types
Step-by-Step Solutions
Real-World Examples
Free Tool
Percentage Calculator
What is X% of Y?
Real-time calculations
Step-by-step solutions
Copy results
Calculation Types
Our percentage calculator supports multiple types of percentage calculations

Basic Percentage

Calculate what percent one number is of another

Percentage Increase

Calculate percentage increase between two values

Percentage of Number

Find what percentage of a number equals another number

Percentage Decrease

Calculate percentage decrease between two values

Common Examples
Here are some common percentage calculation examples

What is 25% of 200?

50

25% × 200 = 0.25 × 200 = 50

What percent is 45 of 180?

25%

(45 ÷ 180) × 100 = 25%

Increase 80 by 15%

92

80 + (80 × 0.15) = 80 + 12 = 92

Decrease 120 by 20%

96

120 - (120 × 0.20) = 120 - 24 = 96

Common Use Cases
  • Calculate sales tax and discounts for shopping
  • Determine grade percentages and academic scores
  • Calculate tip amounts at restaurants
  • Analyze business growth and performance metrics
  • Calculate mortgage and loan interest rates
  • Determine investment returns and gains
  • Calculate markup and profit margins
  • Analyze survey results and statistics
Quick Reference

Common Percentages

10%0.1
25%0.25
50%0.5
75%0.75

Formulas

Percentage = (Part/Whole) × 100
Part = (Percentage/100) × Whole
Whole = Part ÷ (Percentage/100)

About Percentage Calculations

Understanding Percentages

A percentage is a way of expressing a number as a fraction of 100. The word "percent" comes from the Latin "per centum," meaning "by the hundred."

Percentages are used everywhere in daily life - from calculating tips and taxes to understanding interest rates and discounts. Mastering percentage calculations is essential for financial literacy.

Tips for Percentage Problems
  • • Convert percentages to decimals by dividing by 100
  • • To find a percentage of a number, multiply by the decimal
  • • For percentage increase: new value = original × (1 + percentage)
  • • For percentage decrease: new value = original × (1 - percentage)
  • • Double-check your work by working backwards