Percentage calculator
Percentage Decrease Calculator
Percentage decrease measures how much a value has fallen compared with its original starting value.
Percentage decrease
25%
Percentage reduction from the original value.
Formula
((Original − New) / Original) × 100Step-by-step calculation
- 1
Subtract the new value from the original value.
- 2
Divide the decrease by the original value.
- 3
Multiply the result by 100.
Formula
Percentage Decrease = ((Original − New) ÷ Original) × 100
How to calculate it
- Subtract the new value from the original value.
- Divide the decrease by the original value.
- Multiply by 100 to express the result as a percentage.
A price falls from 80 to 60
Values: Decrease = 80 − 60 = 20.
Result: 20 ÷ 80 × 100 = 25% decrease.
Frequently asked questions
What is the reference value?
The original value is the reference. This is why reversing the original and new values generally changes the percentage.
Is percentage decrease the same as percentage difference?
No. Percentage decrease uses the original value as its denominator, while percentage difference uses the average magnitude of both values.
Can the new value be greater than the original?
If the new value is greater, the result is an increase rather than a decrease. The decrease formula should not label it as a positive decrease.