Question

You are going to mix a gallon bucket of window cleaner. The instructions direct you to mix 1 part cleaner to 3 parts water. How much cleaning solution will you need to use?*

Answer 1

Ratio = Cleaner : Water
                   1     :    3

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Find total parts :
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Total parts = 1 + 3 = 4

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Find 1 part :
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4 parts = 1 gallon
1 part = 1/4 gallon

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Find 3 parts :
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1 part = 1/4 gallon
3 parts = 1/4 x 3
3 parts = 3/4 gallon

Ratio = Cleaner : Water
                   1     :    3
                  1/4   :  3/4

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Answer: You will need 1/4 gallon of cleaning solution.
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Answer 2

The answer is 3 gallons