Question

Julie is 12 ounce of cheese in her potato soup recipe yields 8 servings and Julie needs enough for 20 servings how many pounds of cheese will she need

Answer 1

12oz=$\frac{8}{20}$ or $\frac{2}{5}$ of what she needs.
 we can now multiply
12oz *$\frac{5}{2}$= 30 oz  
but we need to know pounds and a pound is 16 oz so 2 pounds should be enough