Answer: 21
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Work Shown:
14/20 = 70/100 after multiply top and bottom by 5
70/100 = 70%
Drake makes 70% of his free throws
If he attempts 30 of them, then he should make about 0.70*30 = 21
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Alternative Method:
(amount made)/(amount attempted) = (amount made)/(amount attempted)
14/20 = x/30
14*30 = 20*x ... cross multiply
420 = 20x
20x = 420
x = 420/20
x = 21
This is another way to see that we expect Drake to make about 21 free throws.