Answer:
3 5/14 (second choice)
Explanation:
c = -3 1/7
d = 6.5 (6 1/2 as fraction)
-3 1/7 as improper fraction: -22/7
6 1/2 as improper fraction: 13/2
Now put both fractions into a common denominator
-22/7 = -44/14
13/2 = 91/14
Now add:
-44/14 + 91/14 = 47/14
Change 47/14 back to fraction
47/14 = 3 5/14