Percentage Decrease Calculator
Find the percentage decrease from one value to another.
Enter values above to calculate
Percentage Decrease
The Formula
% decrease = ((Old − New) ÷ Old) × 100
Step-by-Step (100 → 75)
1 Difference: 100 − 75 = 25
2 Divide by original: 25 ÷ 100 = 0.25
3 Multiply by 100 = 25%
4 Verify: 100 × 0.75 = 75 ✓
Frequently Asked Questions
What is the percentage decrease formula?
Percentage decrease = ((Old − New) ÷ Old) × 100.
Can a percentage decrease be more than 100%?
No. A 100% decrease means the value reached zero.
How do I find the new value after a % decrease?
Multiply the original by (1 − percentage/100). For 25% decrease from 80: 80 × 0.75 = 60.
How is percentage decrease different from increase?
Both use the same formula but from opposite directions. The denominator is always the original value.