Percent Decrease Calculator

Calculate the percentage reduction of a value over time.

Reduction Data

Original Value

New (Smaller) Value

Reduction Summary

Percentage Decrease25.00%

Amount Removed30

Understanding Percent Decrease

Percent decrease measures the relative reduction of a value. It is the absolute decrease divided by the original value, expressed as a percentage.

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Pro Tips

If you buy something on sale, the 'discount' is the percent decrease from the original price.
A 50% decrease means the value has been cut in half.
Always use the original (older) value as the denominator.

Fun Facts

"In chemistry, yield reduction is often discussed in terms of percent decrease from the theoretical maximum."

Formula: ((Old - New) / Old) * 100

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