Answer:
12 2/8
Explanation:
the first step is to convert these fractions into improper fractions so 7 8/7 can be rewritten as 63/8 and 4 3/8 can be rewritten as 35/8.
The denominators are already the same so we can go ahead and just add the numerators (35+63)/8
98/8
since this is an improper fraction and the question gave us a mixed fraction, we'll have to convert it back to a mixed fraction which gives us
= 12 2/8 which is option D