Percent Decrease Calculator
Find the percent decrease from an original value to a smaller one, or reduce a number by a given percentage. You get the percent, the new value and the amount taken off in both modes.
- New value
- 60
- Amount of decrease
- 20
Saved setups
Save a set of inputs you reuse — your usual rate, your loan, your room sizes — and load it back in one tap.
Your recent calculations
Results you calculate here are kept on this device so you can come back to them.
Formula
How to use it
- Choose whether you are finding the percentage or applying one.
- Enter the original value.
- Enter either the new, lower value or the percentage to remove.
- Read the percent decrease, the new value and the amount of the decrease.
Worked examples
From 80 down to 60
- Percent decrease
- 25%
- Amount of decrease
- 20
Decrease 250 by 12%
- New value
- 220
- Amount of decrease
- 30
Recovering from a decrease
A decrease needs a larger percent increase to undo it. After a 25% drop you need a 33.33% rise to get back; after a 50% drop you need 100%.
Stacked reductions
Two reductions in a row do not add. 20% off followed by another 10% off leaves 0.80 × 0.90 = 0.72 of the price, which is 28% off in total, not 30%.
A positive quantity cannot fall by more than 100% — a 100% decrease takes it to zero.
Questions people ask
What is the percent decrease from 80 to 60?
25%. The drop is 20, and 20 ÷ 80 = 0.25.
What is 250 decreased by 12%?
220. 12% of 250 is 30, and 250 − 30 = 220.
If my weight goes from 200 lb to 185 lb, what percent did I lose?
7.5%. The loss is 15 lb, and 15 ÷ 200 = 0.075.