Percent decrease calculator

The Percent Decrease Calculator quickly computes the reduction between two values as a percentage. Enter original and new values, and it shows the decrease percentage. Simple, accurate, and free!

Introduction
A Percent Decrease Calculator helps determine how much a value has reduced relative to its original amount, expressed as a percentage. It’s useful for financial analysis, sales, budgeting, and academic purposes.​

Special Cases and Considerations
Certain scenarios require special attention when calculating percentage decreases:

Starting from zero:Percentage decrease is undefined when the original value is zero
Negative values:Calculations with negative numbers require careful interpretation
Sequential decreases:Multiple percentage decreases are not additive and must be calculated sequentially
Large decreases:The maximum possible percentage decrease is 100% (complete elimination)