Advanced Percentage Calculator

Calculate Percentages Accurately

Five different ways to calculate percentages with formulas and examples

Please enter a valid percentage
Please enter a valid number

Result:

Formula: (X ÷ 100) × Y = Result

Please enter a valid number
Please enter a valid number

Result:

Formula: (X ÷ Y) × 100 = Result%

Please enter a valid number
Please enter a valid percentage

Result:

Formula: (X ÷ Y) × 100 = Result

Please enter a valid number
Please enter a valid percentage

Result:

Increase Formula: X + (X × (Y ÷ 100)) = Result
Decrease Formula: X - (X × (Y ÷ 100)) = Result

Please enter a valid number
Please enter a valid number

Result:

Formula: ((New - Original) ÷ Original) × 100 = Result%

Calculation History

Percentage Calculator FAQs

How do I calculate percentage increase?

To calculate percentage increase: [(New Value - Original Value)/Original Value] × 100. Our calculator does this automatically in the "Percentage Change" tab.

How do I find what percentage one number is of another?

Use the "What percentage?" tab. Enter the part (X) and the whole (Y), and the calculator will compute (X/Y) × 100 to give you the percentage.

How do I decrease a number by a percentage?

Use the "Increase/Decrease" tab. Enter your number and the percentage you want to decrease by, then click the "Decrease" button.

What's the difference between percentage increase and percentage difference?

Percentage increase compares a new value to an original value. Percentage difference compares any two values without considering which is original.

Also Usefull Web Tool

Percentage Calculator Guide

What is a Percentage?

A percentage is a way to express a number as a fraction of 100. The word "percent" means "per hundred" (from Latin "per centum"). It is represented using the percent sign (%).

For example:

  • 50% means 50 per 100 or 50/100 = 0.5
  • 25% means 25 per 100 or 25/100 = 0.25
  • 100% means 100 per 100 or 100/100 = 1

Percentages are used widely in everyday life - for calculating discounts, interest rates, statistics, and many other applications.

What is a Percentage Calculator?

A percentage calculator is a tool that helps you perform various calculations involving percentages quickly and accurately. Our advanced percentage calculator can:

  • Find what X% of a number Y is
  • Determine what percentage X is of number Y
  • Calculate the base number when X is Y% of it
  • Increase or decrease a number by a percentage
  • Calculate the percentage change between two numbers

This eliminates manual calculations and reduces errors, especially when dealing with complex percentage problems.

Common Percentage Formulas

1. Percentage of a number

(Percentage ÷ 100) × Number = Result

Example: What is 20% of 150?

(20 ÷ 100) × 150 = 30

2. What percentage is X of Y?

(X ÷ Y) × 100 = Percentage%

Example: What percentage is 25 of 200?

(25 ÷ 200) × 100 = 12.5%

3. Find base value

(X ÷ Percentage) × 100 = Base Number

Example: 30 is 15% of what number?

(30 ÷ 15) × 100 = 200