Question

The school cook made 30 pounds of potato salad for the school picnic. How many servings is this if each serving is 1/4 pound?

Answer 1

120 servings. 
You do this by multiplying 30 by 4 (because each pound can make 4 servings as represented by 1/4 pound) Hope you understand I'm not good with explaining.

Answer 2

30 lbs divided into 1/4lbs  servings is 120
That means that there can be 120 servings of the potaote salad. 

Hope this helps :)