For b. the answer would be either 323/8 as a fraction or 40 3/8 as a mixed number.
For c. as a fraction it would be 181/2 or 90 1/2 as a mixed number
For d. as a fraction it would be 181/20 or 9 1/20 as a mixed number
The final answer really all depends on what you have been learning in class recently but I would assume it would be the mixed number answer.