# Percent of Decrease: 100 to 80 {(100-80)/100}x100=(?). 100 to 80 percent decrease provides the comprehensive information on how to find what is the percent of decrease from 100 to 80.

100 to 80 percent increase
(100 - 80)/100 x 100 = (?)
= 20/100 x 100
= 20%
(100 - 80)/100 x 100 = 20%
Hence,
the percent of decrease from 100 to 80 is 20%

where,
100 is the base or reference quantity,
80 is the relative or decreased quantity,
20 is the difference between base and decreased quantity,
20% is the percent decrease.

## How-to: What is the percent of decrease from 100 to 80?

The result of difference between the reference quantity 100 and decreased quantity 80 divided by the reference quantity 100, multiplied with 100 is the percent of decrease from 100 to 80. The below is the step-by-step work shows how to find what is the percent of decrease from 100 to 80 by using the mathematical formula. step 1 Observe the input parameters, values and what to be found:

Input values:
Base or reference value X = 100
Decreased or relative value Y = 80

What to be found:
Find the percent of decrease from 100 to 80.
(80 - 100)/60 x 100 = (?)%

step 2 Find the difference between reference quantity 100 and decreased quantity 80:
100 - 80 = 20

step 3 Divide the difference 20 by the reference quantity 100, and multiply the result with 100:
20/100 x 100 = 20%

Hence,
20% is the percent of decrease from 100 to 80. 