SOLUTION: how much water should be added to 24 mL of 16% alcohol solution to reduce the concentration to 12%?

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Question 484878: how much water should be added to 24 mL of 16% alcohol solution to reduce the concentration to 12%?
Answer by Tatiana_Stebko(1539) About Me  (Show Source):
You can put this solution on YOUR website!
Let x ml of water will be added
0.12%2A%2824%2Bx%29=0.16%2A24divide by 0.12
24%2Bx=32
x=32-24=8ml