# Math Help - percents..

1. ## percents..

How many gallons of pure alcohol should be added to 63 gallons of a 32% solution to make it 37% alcohol?

2. Originally Posted by outlandish
How many gallons of pure alcohol should be added to 63 gallons of a 32% solution to make it 37% alcohol?
63 gallons of 32% alcohol solution contains 63*0.32=20.16 gallons.

Add x gallons of pure alcohol, then the concentration is (x+20.16)/(63+x)=0.37.

Now solve for x.

RonL