Percentage Decrease Calculator
Find the percent drop from one value to another.
Reductions as a percentage
Percentage decrease expresses a drop relative to where you started — the way discounts, price cuts, and reductions are usually described. It scales the fall to the original value.
Going from 150 to 120 is a 20% decrease, the 30-unit fall as a share of the original 150. An increase would show as a negative decrease.
Simple and private
The calculation runs in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
How is it calculated?
The difference between old and new, divided by the old value, times one hundred, reported as a decrease.
What if the value went up?
An increase shows as a negative decrease. Use the percentage increase calculator for a positive figure.
Where is this used?
Discounts, price cuts, weight loss, and any reduction you want as a percentage.
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