Reverse Percentage
Recover an original quantity after a known proportional increase. Dividing by the growth factor reverses the operation exactly.
Reverse Percentage
Percentages · 2 inputs
How to use this calculator
- Enter final value in number.
- Enter increase in %.
- Select Calculate and keep the output unit with the answer.
Before you use the answer
Choose the reference quantity before interpreting the number. A ratio, a percentage and a percentage-point difference may use the same observations while answering different questions. For recorded data, keep the original values beside the summary so an unexpected result can be traced back to its inputs.
For a decrease enter a negative rate. Subtracting the same percent from the final number will not undo an increase.
Does it save my inputs?
No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.
Why might a result be approximate?
Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.
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