Percentage Decrease Calculator

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. Also try the Percentage Increase Calculator.

The starting or original value before the decrease.

The final or new value after the decrease.

Results

Percentage Decrease

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Absolute Difference

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Original Value

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New Value

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Frequently Asked Questions

How do I calculate percentage decrease?

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. See also our calculate Percentage Point Percentage Point Difference.

What does a negative percentage decrease mean?

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.

What is the percentage decrease from 100 to 10?

The percentage decrease from 100 to 10 is 90%. This is calculated as ((100 − 10) / 100) × 100 = 90%.

What is the percentage decrease from 5000 to 1000?

The percentage decrease from 5000 to 1000 is 80%. The calculation is ((5000 − 1000) / 5000) × 100 = 80%. You might also find our On Base Percentage (OBP) useful.

What is an example of a real-life percentage decrease calculation?

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.

Can I use this calculator for weight loss percentage?

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.

What is the difference between percentage decrease and absolute decrease?

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.

Does the original value have to be larger than the new value?

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.