What is X% of Y?
20% of 150 is
30
X is what percent of Y?
30 is
20% of 150
Percentage increase or decrease
Increase of
50%
Add or subtract a percentage
1,000 + 18%
1,180
1,000 - 18%
820
About Percentage Calculator
Percentage Calculator answers the four questions people ask most: what is X% of Y, X is what percent of Y, how much did a number go up or down, and what is a number after adding or removing a percent.
Read the guide: How to Calculate Percentages: Simple Methods and Examples →
Tips for best results
- For a discount, use subtract a percentage.
- For a price rise, use add a percentage.
- Percent change uses the starting number as the base.
How to use Percentage Calculator
- 1
Pick the question
Find the box that matches what you want to know.
- 2
Type your numbers
The answer updates as you type.
- 3
Read the result
Copy the figure you need.
Frequently asked questions
Why is a 50% rise then 50% fall not zero?
Each change uses a different base, so +50% then -50% ends at 75% of the start.
Is my data stored?
No. This tool runs inside your browser, so your data is processed on your own phone or computer and is not sent to our servers.