A recipe calls for 1/4 cup of milk for every 1 1/2
cups of flour. How many cups of flour will you need for 1/2
cup of milk?

3 cups flour

Step-by-step explanation:

set up a proportion and cross-multiply:

1/4 = 1/2

3/2      f

1/4f = 3/4

4f = 12

f = 3

3 cups

Step-by-step explanation

basically if 1/4 cup of milk is for 1 1/2 cups of flour 1/2 cup is twice the amount that a quarter cup is because a 1/4 cup + a 1/4 cup = 1/2 cup so you double the amount of flour too and 1 1/2 + 1 1/2 is 3 cups of flour.

1/4 + 1/4 = 1/2 (milk)

1 1/2 + 1/12 = 3 (flour)

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