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? *

Ratio = Cleaner : Water
                   1     :    3


Find total parts :

Total parts = 1 + 3 = 4


Find 1 part :

4 parts = 1 gallon
1 part = 1/4 gallon


Find 3 parts :

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


You will need 1/4 gallon of cleaning solution.