Contact

Percentage Decrease Calculator

See the original, the amount dropped, and what remains.

Decrease by a percent
Starting amount and the percent it shrinks by.
%
Amount remaining68

80 decreased by 15% is 68.

80 × (1 − 15 ÷ 100) = 68

Original80
Decrease12
Find the percentage decrease
Original value and the new value.
Percentage decrease15%

80 decreased to 68 is a 15% decrease.

(80 − 68) ÷ 80 × 100 = 15%

Original80
New68
Decrease12

Calculations happen in your browser.

Worked example

Say an $80 bill decreases by 15%. The drop is $12, so $68 remains. The same method works for a 30% fall in website traffic: 10,000 visits becomes 7,000.

FAQ

How is a decrease different from a discount?
The maths is the same. Use this page when the shrinking number isn't a shop price tag — usage, headcount, inventory, that kind of thing.
Can the result go below zero?
A 100% decrease reaches zero. More than 100% goes negative, which is valid for some ledgers and not for quantities. Check the context before you use it.
How do I find the percentage decrease between two numbers?
Use the second card. Divide the drop by the original, then multiply by 100. From 80 to 68 is a 15% decrease.