# What is the % change in the area of a rectangle when its length increases by 10% and its width decreases by 10%?

##### 1 Answer

Mar 4, 2018

I tried this:

#### Explanation:

Let us call the length

let us change the two to get:

rearrange:

but

so the new area is

For example;

imagine a rectangle where:

Area

Now we increase the length and decrease the width:

Area'

that represents