can people plz help me on this work that i don't get? just do 55 to 63 plz

Answer:
55. answer is D
56. 0.35
57.
58.
59.
60.21/5
61.13/4
62.5/3
63.25/4
Answer:
55.25/80
57.
58.
59.
60.21/5
61.13/4
62.5/3
63.25/4