Calcwise / Percentage calculator
Percentage calculator
Three common percentage questions in one place.
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Frequently asked questions
How do I calculate a percentage change?
Subtract the old value from the new value, divide by the old value and multiply by 100.
Why does a 50% rise followed by a 50% fall not return to the start?
The second change is applied to a bigger number. 100 rises to 150, and a 50% fall from 150 gives 75.