How to use
Enter original and new values.
Example
A change from 100 to 125 is a 25% increase.
Math
Percentage Change Calculator
Calculate percentage increase or decrease.
YOUR RESULTEnter your values and calculate.
Frequently asked questions
How is percentage increase or decrease calculated?
Subtract the old value from the new value, divide by the old value, then multiply by 100. A positive result is an increase, and a negative result is a decrease.
Why is my result negative?
A negative percentage change means the new value is lower than the old value, indicating a decrease rather than an increase.
Results provided by this calculator are estimates for general informational purposes only.