Question

Suppose for your cookout you need to make 100 hamburgers. You knoe that 2.00 pounds will make 9 hamburgers. How many pounds will u need?

Answer 1

Set it up as a direct proportion:
2.0lb/9hb = x/100hb
solve x (100hb •2.0lb)/9hb = 22.2lb


22.2lbs

Answer 2

If 
2.0 pound will make 9 hamburgers 
so 100 hamburgers will make by pounds = 100/9 × 2.0 = 22.2 pounds

the ans is (22.22 pounds will make 100 hamburgers)