# Percent of Decrease: 400 to 100 {(400-100)/400}x100=(?). 400 to 100 percent decrease provides the comprehensive information on how to find what is the percent of decrease from 400 to 100.

400 to 100 percent increase
(400 - 100)/400 x 100 = (?)
= 300/400 x 100
= 75%
(400 - 100)/400 x 100 = 75%
Hence,
the percent of decrease from 400 to 100 is 75%

where,
400 is the base or reference quantity,
100 is the relative or decreased quantity,
300 is the difference between base and decreased quantity,
75% is the percent decrease.

## How-to: What is the percent of decrease from 400 to 100?

The result of difference between the reference quantity 400 and decreased quantity 100 divided by the reference quantity 400, multiplied with 100 is the percent of decrease from 400 to 100. The below is the step-by-step work shows how to find what is the percent of decrease from 400 to 100 by using the mathematical formula. step 1 Observe the input parameters, values and what to be found:

Input values:
Base or reference value X = 400
Decreased or relative value Y = 100

What to be found:
Find the percent of decrease from 400 to 100.
(100 - 400)/60 x 100 = (?)%

step 2 Find the difference between reference quantity 400 and decreased quantity 100:
400 - 100 = 300

step 3 Divide the difference 300 by the reference quantity 400, and multiply the result with 100:
300/400 x 100 = 75%

Hence,
75% is the percent of decrease from 400 to 100. 