45dollars is 20 percent of what?

Answer 1

It's rather simple after you think about it in terms of Money.

Example:

G = GROSS

.20 = %

45 = NET

G x .20 = 45

Now, use your COMMUNICATIVE property:

G x .20 = 45

-------- ----

.20 .20

G = 45

----

.20

G = 225

So, the answer to your question, $45 is 20% of $225