Percentage Calculator

Calculate percentages, increases, decreases, and differences

Result:

0.00

Percentage Calculations

A percentage is a number or ratio expressed as a fraction of 100.

How to Use This Tool

  1. Enter the required values in the input fields
  2. Select any necessary options or units from the dropdown menus
  3. Click the calculate button
  4. View your results in the result section

Why We Use This Tool

  • Accuracy: Get precise calculations without manual computation errors
  • Efficiency: Save time by quickly performing complex calculations
  • Learning: Understand the formulas and concepts behind the calculations
  • Decision-making: Use reliable data to make informed choices

Common Percentage Formulas

  • What is X% of Y?: (X/100) × Y
  • X is what % of Y?: (X/Y) × 100
  • Increase Y by X%: Y × (1 + X/100)
  • Decrease Y by X%: Y × (1 - X/100)
  • % difference between X and Y: (|X-Y|/((X+Y)/2)) × 100

Practical Examples

Calculation Example Result
What is 20% of 50? (20/100) × 50 10
15 is what % of 50? (15/50) × 100 30%
Increase 80 by 25% 80 × (1 + 25/100) 100
Decrease 120 by 15% 120 × (1 - 15/100) 102

Common Percentage Uses

  • Finance: Interest rates, investment returns
  • Retail: Discounts, sales tax, tips
  • Statistics: Survey results, population changes
  • Science: Concentration, error margins
  • Everyday: Battery life, progress tracking

Percentage Points vs. Percent

A percentage point is the arithmetic difference between two percentages. For example, moving from 10% to 12% is a 2 percentage point increase, but a 20% increase in the rate.