# 18 is 45% of what ?

##### 3 Answers

#### Answer:

#### Explanation:

The proportion I like to use with these types of problems goes like:

Part/whole can also be written as "is/of"

So in this case:

- The part (is) is
#18# - The whole (of) is unknown to us - let's say
#x# - The percent (%) is
#45#

Now:

We can cross multiply to get:

Hope this helps!

Apr 20, 2018

#### Answer:

#### Explanation:

Let

Divide both sides by

Check.