# What is the percent change of 20 to 40?

May 8, 2018

The answer is 100%.

#### Explanation:

First, we have to calculate how much the number has increased

$\text{increase} = 40 - 20 = 20$

$20$ is the increase in the original number. So we can calculate the percent change by using the formula

"% change" = "Increase or decrease in no"/"orignal no" xx 100%

So

"% change" = 20/20 xx100%=100%

The answer is 100%.