Answer:
 cups of sugar.
Explanation:
We have been given that Adrian's recipe for cranberry relish calls for 
 cups of sugar. He wants to use 1/2 that amount.
First of all let us convert our given mixed fraction into improper fraction.

Since Adrian wants to use half of the sugar, so we need to divide 
 by 2 to find the amount of sugar he should use.



Therefore, Adrian should use 
 cups of sugar.