By how much did something fall, in percentage terms? This calculator compares an original value with a lower new value and gives you the percentage decrease — the standard way to describe discounts, price drops, weight loss, or any reduction. You also see the absolute reduction, so you know exactly how much was lost in real units.
The starting number, before the decrease.
The number after the decrease.
Percentage decrease
-25.00%
Shown as a negative number; the magnitude is the % drop.
Percentage decrease uses the same formula as percentage increase — only the direction differs:
% decrease = (Old value − New value) ÷ Old value × 100
This calculator shows the signed change (negative for a drop), so a result of −25% means a 25% decrease. Dividing by the old value is essential: a fall from 200 to 150 is a 25% decrease, not 33% — that 33% figure is the increase you'd need to climb back.
A jacket's price falls from ₹200 to ₹150:
Note the asymmetry: getting back from ₹150 to ₹200 would be a 33.3% increase.
Percentage decrease is shown as a negative number — read the magnitude as the size of the drop (−25% = down by a quarter). Absolute reduction is the raw amount lost, in the original units.
Remember the recovery asymmetry: after a 50% fall, you need a 100% gain to break even. That single fact explains why investors fear drawdowns more than they celebrate rallies.
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Content last reviewed on 2026-10-06.