MARZPercentage Calculator
Find percentages, percentage change, and percentage differences instantly.
Loading tool…
About this tool
Work out what X% of a number is, what percentage one number is of another, or the percentage increase or decrease between two values — all calculated instantly as you type.
How to use
- Choose the calculation you need: 'X% of Y', 'X is what % of Y', or percentage change.
- Enter your numbers into the fields.
- Read the result immediately below — it updates as you type.
FAQ
How is percentage change calculated?
Percentage change = ((new value − old value) / old value) × 100. A positive result is an increase, a negative result is a decrease.
Can I calculate a percentage of a negative number?
Yes, the calculator handles negative inputs and shows signed results.