Answer: 5 servings.
Step by step explanation:
A restaurant chef has made 2 1/2 jars = 2x2+1/2 = 5/2 jars of pasta sauce.
Each serving requires 1/2 of a jar of sauce.
Amount of servings the chef will be able to prepare = 5/2 / 1/2
= 5/2 * 2/1
= 5 servings.