Percentage Increase and Decrease Calculator
Increase or decrease a number by a percentage and see the new value, the difference and the multiplier.
Increase or decrease by a percentage
Type a number, a percentage and choose the direction.
New value
92
12
Change
1.15
Multiplier
In words
80 increased by 15% = 92
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On this page
Increase and decrease examples
| Number | Change | Result |
|---|---|---|
| 80 | increase by 15% | 92 |
| 80 | decrease by 15% | 68 |
| 200 | increase by 50% | 300 |
| 59.99 | decrease by 20% | 47.992 |
| 1000 | decrease by 100% | 0 |
Formula
new value = number x (1 + p / 100) for an increase, number x (1 - p / 100) for a decrease
How the increase or decrease by a percentage works
- Step oneType the starting number.
- Step twoType the percentage and choose Increase or Decrease.
- Step threeRead the new value, the change and the multiplier.
What this tool does not do
- It applies one percentage once; it does not chain several changes.
- It does not round to money; long results are cut at 8 decimals.
- A decrease of more than 100 percent is refused because it would go below zero.
Frequently asked questions
Why does an increase of 50% followed by a decrease of 50% not return to the start?
The second percentage is taken from a bigger number. 100 up by 50% is 150, and 150 down by 50% is 75.
What is the multiplier?
The number you multiply by to get the new value in one step: 1.15 for a 15% increase, 0.85 for a 15% decrease.
How do I find the percentage change between two numbers?
Use the percent change calculator, which works the other way round.