Percentage Increase and Decrease Calculator FREE
Raise or lower a value by a percentage and see the new amount, the difference and the factor, with the formula shown.
Percentage increase and decrease
Add or take a percentage off a value, and see the amount as well as the result.
How this is calculated
Enter a starting value and a percentage, choose increase or decrease, and you get the new value, how much was added or taken away, and the multiplier that does it in one step (a 15% increase is x1.15, a 15% decrease is x0.85).
The two directions are not mirror images: 100 raised by 20% is 120, and 120 lowered by 20% is 96, not 100. The result block shows the factor so that asymmetry is visible rather than surprising.
For the change BETWEEN two known values, the percentage calculator has a mode for that; for the difference with no direction, use the percentage difference calculator.
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