Percent Change Calculator
Enter an original value and a new value to calculate the percentage change, including the percentage increase or decrease from the original value.
How It Works
The calculator subtracts the original value from the new value, divides the difference by the absolute value of the original value, and multiplies the result by 100. A positive result indicates an increase, while a negative result indicates a decrease.
Formula
Percentage Change = ((New − Original) ÷ |Original|) × 100
Example
Going from 80 to 100 results in a 25% increase. Going from 100 to 80 results in a −20% change, meaning the value decreased by 20%.
Frequently Asked Questions
- How do you calculate percentage change?
- Subtract the original value from the new value, divide the difference by the absolute value of the original value, and multiply by 100.
- What does a positive percentage change mean?
- A positive percentage change means the new value is greater than the original value, indicating an increase.
- What does a negative percentage change mean?
- A negative percentage change means the new value is smaller than the original value, indicating a decrease.
- What is the percentage change from 80 to 100?
- The percentage change from 80 to 100 is 25%, which represents a 25% increase.
- What is the percentage change from 100 to 80?
- The percentage change from 100 to 80 is −20%, which represents a 20% decrease.
- What happens if the original value is zero?
- Percentage change cannot be calculated when the original value is zero because division by zero is undefined.
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