Question

How much water must be added to a gallon of 10% saline solution to create a 2% solution?

Answer 1

\[
\frac{10\%}{1~\text{gallon}} = \frac{2\%}{x~\text{gallons}}
\]

Answer 2

Once you have the gallons needed \(x\), you can subtract the existing number of gallons \(1\), to get the answer: \(x-1\).

Answer 3

Thanks