Percentage Decrease Calculator
This calculator finds the percentage decrease from an original value to a new, lower value. Enter the old and new values to see how much the value dropped as a percentage.
How It Works
Subtract the new value from the old value to find the absolute drop, divide by the original value, and multiply by 100. The result is always positive for a true decrease. The old value is always the reference point.
Worked Examples
Example 1. Item marked down from $80 to $60. ((80−60)÷80)×100 = 25% decrease.
Example 2. Traffic fell from 10,000 to 7,500 visits. ((10,000−7,500)÷10,000)×100 = 25% decrease.
When to Use This Calculator
Use for price drops, sales declines, population decreases, or any metric that fell from a prior baseline.
Frequently Asked Questions
Is a 50% decrease the same as halving?
Yes. A 50% decrease reduces the value to half the original.
Can you have more than a 100% decrease?
No. A 100% decrease means the value went to zero. Values cannot decrease by more than 100% of themselves.
What is the new value after a percent decrease?
Multiply the original by (1 − rate/100). For example, $80 − 25% = $80 × 0.75 = $60.