📊 Percentage Change Calculator
Calculate percentage increase or decrease between values
How Percentage Change Is Calculated
Formula
Percentage Change = ((New Value − Old Value) / Old Value) × 100
- 1Enter the original (old) value.
- 2Enter the new value.
- 3The tool subtracts the old value from the new value.
- 4That difference is divided by the old value.
- 5The result is multiplied by 100 to express it as a percentage.
About Percentage Change Calculator
Calculate the percentage increase or decrease between two values. Perfect for tracking price changes, growth rates, stock performance, and data analysis.
Frequently Asked Questions
What is the difference between percentage change and percentage difference?
Percentage change measures the shift from an original value to a new value. Percentage difference compares two values without treating one as the starting point, using the average of both as the base.
Can percentage change be negative?
Yes. A negative percentage change means the value decreased. For example, going from 200 to 150 is a −25% change.
How do I calculate percentage change in reverse?
To find the original value, divide the new value by (1 + percentage change / 100). For example, if something is now 120 after a 20% increase, the original was 120 / 1.20 = 100.