🛠 Percentage calculator
🔒 Runs on your device; your file is not sent to any server.
How to use this tool
- In the first row, enter a percent and a number to see, for example, what 15% of 8000 is.
- In the second row, enter two numbers to see what percent the first is of the second.
- In the third row, enter an old and a new value to get the percent change.
- Results show below instantly; there is no button to press.
What you can use it for
- Compare two salary offers as a percentage increase.
- Work out a discount or tax on a price.
- Calculate an exam score or progress towards a goal.
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FAQ
Why is my change negative?
Negative means a decrease. Going from 100 to 80 is a change of -20%.
Why is nothing showing?
Each row needs both boxes filled. In the second row the second number cannot be zero, and in the third the old value cannot be zero.
Does +10% then -10% get me back to the start?
No. 100 plus 10% is 110, and 110 minus 10% is 99, because each percentage applies to a different base.
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