Percentage change calculator
Compare the previous and next values to check the change and increase/decrease rate.
Input
The example value has been entered. Check it immediately or change the value.
Input is processed in the browser. Refreshing returns a sample value.
Result
Check or change the value using the example value result.
If the previous value is 0, the increase/decrease rate cannot be defined. For negative values, use the absolute value as the denominator.
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Share the tool link and result text together. No URL is included in the result. Check the below content and then share it.
Calculation·conversion criteria
Determine the increase and decrease rates compared to the previous value.
Input example
Increase from 80 to 100: 25%
If 80 changes to 100, the change is 20, and the increase rate is 20÷80×100=25%. Conversely, if 100 becomes 80, it decreases by 20%, so determine and enter the direction.
How to use
- Use the entered example value or change the previous value or next value items.
- Click Verify result and check the following result.
- Result can be copied if needed.
Frequently Asked Questions
Can the change rate be calculated based on negative values or 0?
0 cannot be the denominator, so an error message is displayed. Negative values are interpreted as the absolute value of the previous value as per this tool’s rules, so they are distinguished from typical positive growth rates.
Calculation criteria and reference materials
The calculation formula and scope of this tool are disclosed in the above description. Examples can be checked by substituting input values into the formula or following the specified string and calendar handling rules.
Verification of calculation criteria: · Calculation·verification principles · Report errors