If 1/2 cup of milk makes 8 donuts. How much cups it takes to make 28 donuts

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If 1/2 cup of milk makes 8 donuts. How much cups it takes to make 28 donuts?

Set up a proportion of cups to donuts, where c is the number of cups required to make 28 donuts:
1/2/8 = c/28

Cross multiply:
28(1/2) = 8c
8c = 14

Plugging this equation into our search engine, we get:
c = 1.75