Percentage Calculator Formula

Understand the math behind the percentage calculator. Each variable explained with a worked example.

Use the Percentage Calculator

Formulas Used

Result

result = value * percentage / 100

Remaining

remaining = value - value * percentage / 100

Variables

VariableDescriptionDefault
valueNumber200
percentagePercentage(%)15

How It Works

How to Calculate a Percentage

Formula

Result = Number × (Percentage / 100)

Example: 15% of 200 = 200 × 0.15 = 30

Worked Example

What is 15% of 200?

value = 200percentage = 15
  1. 0115% of 200 = 200 × 15/100
  2. 02= 200 × 0.15
  3. 03= 30

Ready to run the numbers?

Open Percentage Calculator