Percentage Calculator

Calculate percentages easily with our advanced calculator. Find percentage of a number, calculate percentage increase/decrease, and solve various percentage problems.

Calculate Percentage

Calculate Percentage of a Number

%
Example: What is 25% of 200?

Find What Percentage X is of Y

Example: 50 is what percent of 200?

Calculate Percentage Change

Example: From 100 to 150 - what is the percentage increase?

Find Original Value After Percentage Change

%
Example: After 20% increase, value is 120. What was original value?

Calculation Results

Percentage
25%
of total
Amount
50
calculated value
Change
+50%
increase/decrease
Original
100
before change

Calculation Formula

Percentage = (Value / Total) × 100

Step-by-Step Calculation

  • 1 Enter the values in the input fields above
  • 2 Select the type of percentage calculation you need
  • 3 Click "Calculate" to see the results

Understanding Percentage Calculations

Percentage is a way of expressing a number as a fraction of 100. It's commonly used to compare proportions, calculate discounts, measure changes, and analyze data.

Basic Formulas

  • Percentage = (Part / Whole) × 100
  • Part = (Percentage × Whole) / 100
  • Percentage Change = [(New - Old) / Old] × 100
  • Original = Final / (1 + Percentage/100)

Common Applications

  • Discounts and sales calculations
  • Tax calculations (VAT, GST, sales tax)
  • Tip calculations in restaurants
  • Grade calculations and score percentages
  • Financial growth and investment returns

Quick Tips

  • To find 10%: Divide by 10
  • To find 5%: Find 10% and divide by 2
  • To find 1%: Divide by 100
  • To increase by X%: Multiply by (1 + X/100)
  • To decrease by X%: Multiply by (1 - X/100)