I think it depends on the grading scale. However, if each was worth a point then maybe you could only miss 15 questions to get an 85%.
Depends on your grading scale, but an 88 percent would probably be a B+ (good job!)
D+
85 percent = 0.85
85 percent of 75 is 63.75
C
27 percent of 85 is 22.95.
85 percent of 139 = 118.15
996.2 is 85 percent of 1172
173 percent of 85 is 147.05
85 percent of 38 is 32.3
85 percent of 900 is 765.