Answer:
15/8 gallons
Step-by-step explanation:
Find the ratios
3/4 gallons of milk = 12 smoothies
x gallons of milk = 30 smoothies
3/4 : 12 = x : 30
3/4 ÷ 12 = x / 30
3/4 × 1/12 = x / 30
3/48 = x / 30
1 / 16 = x / 30
Cross product
1*30 = 16*x
30 = 16x
x = 30 / 16
= 15 / 8
x = 15/8 gallons of milk to make 30 smoothies