Percentage Calculator - Calculate Percentages Online Free

A percentage is a way of expressing a number as a fraction of 100. The symbol % means 'per hundred'. Percentages are used daily for calculating discounts, taxes, interest rates, and statistical data.

1. 1

   Select Calculation Type

   Choose the type of percentage calculation you need from the dropdown menu

2. 2

   Enter Values

   Input the known values in the appropriate fields

3. 3

   Get Results

   The calculator automatically computes the result

4. 4

   Review Formula

   Check the calculation details to understand the formula used

• 1

  To find X% of Y, multiply Y by X and divide by 100

• 2

  To find what percentage X is of Y, divide X by Y and multiply by 100

• 3

  Percentage increase = ((New - Old) / Old) x 100

• 4

  For reverse percentage, divide the part by the percentage and multiply by 100

• Confusing percentage points with percentages - an increase from 10% to 15% is 5 percentage points but a 50% relative increase

• Calculating discount from the discounted price instead of the original price

• Adding percentages directly - two successive 10% increases equal 21%, not 20%

• Forgetting that a 50% decrease requires a 100% increase to return to the original value