Percentage change
Calculate the percentage increase or decrease between an original value and a new value, with the formula and worked steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
Change % = (new − original)/original × 100
Variables & units
- Original value
- Numeric value · minimum 0.000001, maximum 1000000
- New value
- Numeric value · minimum 0, maximum 1000000
Worked example
An increase from 80 to 100 is 25%.
Assumptions
A negative result indicates a decrease. The original value must be positive.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
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