About This Calculator
This tool calculates the percentage decrease between an initial and final value—ideal for analyzing reductions in prices, quantities, or other metrics.
How It Works
It subtracts the final value from the initial value, divides by the initial value, and multiplies by 100 to get the percentage decrease.
Percentage Decrease =
Initial − FinalInitial
× 100%Frequently Asked Questions
What if the result is negative?
A negative value means the final value is higher, indicating an increase, not a decrease.
Can I use any units?
Yes, as long as both values use the same unit.
Does the final value have to be lower?
Yes, to reflect a true decrease. Otherwise, the result represents a percentage increase.