What is the difference between the two calculators on this page?

The top one answers "what is X% of Y?"; the bottom one answers "what is the percentage change from one number to another?" (e.g. price going from 100 to 120 is a +20% change).

Can percentage change be negative?

Yes — a decrease shows as a negative percentage (in red), an increase as positive.

Does it work with decimals?

Yes — both value and percent fields accept decimal numbers.

Percentage Calculator

Find what percent a value is of another, or how much a percentage change is.

Percent (%)

Of value

Percentage change

From

+20.00%

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How it works

1
Answer "what is X% of Y?"
Enter a percent and a value — the result updates live, no button needed.
2
Or find a percentage change
Scroll to "Percentage change" and enter a From/To pair to see the % increase or decrease.
3
Read the result
Both calculators update instantly as you type.

FAQ

What is the difference between the two calculators on this page?: The top one answers "what is X% of Y?"; the bottom one answers "what is the percentage change from one number to another?" (e.g. price going from 100 to 120 is a +20% change).
Can percentage change be negative?: Yes — a decrease shows as a negative percentage (in red), an increase as positive.
Does it work with decimals?: Yes — both value and percent fields accept decimal numbers.