Percentage Calculator
Percent of a number, a share of a total, and increases or decreases by percent.
What is X% of Y?
The % you want
The whole amount
- Result
- 375
- The rest
- 2,125
15% of 2,500
The other 85%
X is what percent of Y?
The part
The total
- Share
- 25%
- Remaining share
- 75%
45 out of 180
135 of the total is left
Increase or decrease a number by X%
Before the change
How much to add or take off
- New value
- 1,416
- Added on
- 216
1,200 plus 18%
The size of the change itself
What is the percentage change from X to Y?
The old value
The new value
- Change
- +25%
- Difference
- 10
An increase
In plain numbers, not percent
A percentage change is always measured against the first number, which is why a rise from 40 to 50 is +25% while the fall back from 50 to 40 is −20%. Answers are shown to four decimal places and trimmed, so a clean division reads as a whole number. Everything is worked out in your browser — nothing you type is sent anywhere.
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