Enter your Original Value and New Value into the Percentage Decrease Calculator to find the percentage decrease between the two numbers. You'll also see the absolute difference between the values. Works for prices, weights, salaries, expenses, or any numeric comparison where a value has dropped.
Percentage Decrease
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Absolute Difference
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Original Value
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New Value
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To calculate percentage decrease, subtract the new value from the original value, then divide that result by the absolute value of the original. Finally, multiply by 100 to get the percentage. The formula is: Percentage Decrease = ((Original − New) / |Original|) × 100.
If the result is negative, it means the new value is actually larger than the original value — so there was an increase, not a decrease. In that case, you should use a percentage increase calculator instead.
The percentage decrease from 100 to 10 is 90%. This is calculated as ((100 − 10) / 100) × 100 = 90%.
The percentage decrease from 5000 to 1000 is 80%. The calculation is ((5000 − 1000) / 5000) × 100 = 80%.
A common example is a sale price. If a product originally costs $80 and is now on sale for $60, the percentage decrease is ((80 − 60) / 80) × 100 = 25%. You're saving 25% off the original price.
Yes. Enter your starting weight as the original value and your current weight as the new value. The calculator will show the percentage of body weight you've lost.
Absolute decrease is simply the raw numeric difference between the original and new values (Original − New). Percentage decrease expresses that difference as a proportion of the original value, making it easier to compare across different scales.
For a true percentage decrease, yes — the original value should be greater than the new value. If the new value is larger, the calculator will return a negative percentage, indicating an increase rather than a decrease.