Hi there!
18 ×
= amount of ice cream in container
13.5 = amount of ice cream in container
Let's replace the number of cups by "C" :
13.5 = C ×

Isoltate "C" by dividing each side of the equation by

40.5 = C
Which means that your answer is : There are 40.5 1/3-cup servings of ice creamin the container!
There you go! I really hope this helped, if there's anything just let me know! :)