In this question, you have to add the inches. so, (9+3/4) + (1+1/8) = 87/8
I converted the mixed fractions into improper fractions, which gave me:
39/4 and 9/8 and then, I multiplied the 39 by two, so that the fractions have a common denominator (8) -> 78/8 + 9/8 and this equals 87/8