Percentage of a number
Everyday
How to calculate increase by percentage
This tool calculates increase by percentage from Original, Increase (%). Enter each quantity in its labelled field, then use the formula below to check the calculation.
Formula
original × (1 + percentage ÷ 100)
Worked example
- Original
- 80
- Increase (%)
- 20
Applying the formula to these values gives 96 .
What should I check?
Work out percentages, discounts, bill splits, recipe amounts and other everyday numbers. Each tool shows its formula and a worked example.
Use the reset button to restore this example. Your inputs are processed in this browser and are not included in a shared calculator link. See our methodology and limitations.