Answer:
7² = 49 ans
Step-by-step explanation:
7² == 49 ans .....
Remember some basic rules

and
![x^ \frac{m}{n}= \sqrt[n]{x^m}](https://tex.z-dn.net/?f=x%5E%20%5Cfrac%7Bm%7D%7Bn%7D%3D%20%5Csqrt%5Bn%5D%7Bx%5Em%7D%20%20)
so

1/2-2/7=
7/14-4/14=
3/14

First subtract the original high from the new high:
567 - 540 = 27 more vacuums sold.
Now divide the increase amount by the original high and multiply that by 100 to get the percentage:
27 / 540 = 0.05
0.05 * 100 = 5% Increase.
You want to make sure to factor each equation as much as you can first.
So just focus on the numerator first.

To factor the numerator:

factor out an x

factor out the rest completely.
Now for the denominator:


factor out a -4

factor out the rest.
This leaves you with:

Then you can simplify:

I'm not sure what you're supposed to find exactly, so if you need more help you can ask me (: