Question

A recipe that serves 8 people requires 1 and one fourth cups of sugar. Using this​ recipe, how many cups of sugar are needed to serve 20 ​people?

Answer 1

3 1/8 or 3.125.

Explanation:

First you would change 1 1/4 to 5/4. Then you would make a proportion of 5/4 or I like to use decimals, 1.25, over 8. Your proportion would look like: 1.25/8 = x/20. Then cross multiply 1.25 and 20 then divide your product by 8. Your final answer is 3.125 or 3 1/8. Hope this helps!