Given:
a 12-pound ham will feed 9 people.
so, the unit rate will be:
[tex]\frac{12}{9}=\frac{4}{3}[/tex]Which mean David need 4/3 pound of ham for each person
So, If 72 people are coming to David's home for a party
The pounds of ham =
[tex]\frac{4}{3}\cdot72=96[/tex]So, he will need 96 pounds of ham.