The Smith family has a two-and-a-half-foot-long sandwich to share. One-half foot of the sandwich will serve one person. How many one-half foot servings are in this sandwich?

To find the amount of servings, we divide the total sandwich by the amount given to one person:

2 1/2 / 1/2

This can simplify into:

5/2 / 1/2

Dividing a fraction is basically multiplying it's flipped side:

5/2 * 2

10/2 = 5

There are 5 servings in the sandwich