Percentage Decrease Calculator
Enter your original and new values to instantly calculate the exact percentage decrease.
Percentage Decrease Formula
The percentage decrease formula measures how much a value has dropped relative to its original amount. It is widely used in finance, retail, science, and everyday calculations.
Percentage Decrease = ((Original Value - New Value) / Original Value) × 100
How to Calculate Percentage Decrease Step by Step
Step 1: Subtract the new value from the original value to find the difference.
Step 2: Divide that difference by the original value.
Step 3: Multiply the result by 100 to convert it to a percentage.
Quick Examples
Click any example to see the full calculation.
200 → 150
25% decrease
80 → 60
25% decrease
500 → 350
30% decrease
1000 → 750
25% decrease
45 → 36
20% decrease
120 → 90
25% decrease
Frequently Asked Questions
How do you calculate a percentage decrease?
Subtract the new value from the original value, divide the result by the original value, then multiply by 100. For example, if a price drops from $200 to $150: ((200 - 150) / 200) × 100 = 25% decrease.
What is the percentage decrease from 100 to 75?
The percentage decrease from 100 to 75 is 25%. Calculation: ((100 - 75) / 100) × 100 = 25%.
What is the difference between percentage decrease and percentage change?
Percentage decrease specifically measures how much a value has gone down relative to the original. Percentage change can be either positive (increase) or negative (decrease). When the new value is higher than the original, it is a percentage increase, not a decrease.
Can a percentage decrease be more than 100%?
No. A percentage decrease ranges from 0% (no change) to 100% (the value dropped to zero). If your result is over 100%, it means the new value is negative, which is a different type of calculation.
How do I calculate percentage decrease in Excel?
In Excel, use the formula: =(A1-B1)/A1 where A1 is the original value and B1 is the new value. Format the cell as a percentage to display the result.