SOLUTION: how much of a 25% solution must be added to a gallon of water to get a 2.8% solution?

SOLUTION: how much of a 25% solution must be added to a gallon of water to get a 2.8% solution?

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Question 880341: how much of a 25% solution must be added to a gallon of water to get a 2.8% solution?
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
This depends on densities and how the percent is intended. ASSUMING you are dealing with %v/v, set the equation as this:

Let x = VOLUME of the 25% solution to add.
.
Solve for x. The result for x is VOLUME as GALLONS.
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