Percent Decrease Calculator
Enter any two values. Click Calculate to solve the third.
Use this only when the final value is lower than the initial value. If the final value is higher, use percent increase instead.
Use this Percentage Decrease Calculator to find how much a value has decreased, calculate the final value after a decrease, or work backward to find the original value.
Calculation Methods
Decrease = initial value − final value
Percentage decrease = (decrease ÷ initial value) × 100
Final value = initial value × (1 − percentage ÷ 100)
Initial value = final value ÷ (1 − percentage ÷ 100)
Example
If a value falls from 250 to 200:
Decrease = 250 − 200 = 50
Percentage decrease = 50 ÷ 250 × 100 = 20%
The value decreased by 20%.
Important Note
Use this calculation when the final value is lower than the initial value. For ordinary percentage-decrease calculations, the initial value must be nonzero.