Sherry S. answered • 03/13/19

Because no one should have to say, "I was never any good at math."

The problem can be completed as a proportion. (Not sure how to put the equal sign between my 2 fractions below. It would be 2/5 = x/7)

__2 parts concentrate __ __ x gallons concentrate__

5 parts water 7 gallons water

Cross multiply & solve

14 = 5x

14/5 = x

2.8 = x