Question 1

How do I calculate X% of Y?

Accepted Answer

Choose "Percentage of a number", enter X and Y — the result is computed as (X / 100) × Y.

Question 2

How do I find the percentage change between two numbers?

Accepted Answer

Choose "Percentage change" and enter the original and new value — the tool shows the increase or decrease as a percentage.

Question 3

Are negative numbers supported?

Accepted Answer

Yes, the tool correctly handles negative values and decreases.

Question 4

Can I use decimal numbers?

Accepted Answer

Yes, decimal input with a period or comma is supported.

Question 5

Is my data stored anywhere?

Accepted Answer

No, all calculations happen locally in your browser and are never stored.

Percentage Calculator

How to use it