Questions 7, 8, and 9 were treated as extra credit, so a score of 92 (the point total for questions 1-6) counts as 100%.
90,
82,82,80,
.
68,68,67,66,63,61,60,
59,57,53,52,50
90
82
82
A's & A-'s 80
---------------
B+'s, B's, & B-'s 68
68
67
66
63
61
60
B+'s,B's, & B-'s 59
---------------
C+'s, C's, & C-'s 57
53
52
C+'s, C's, & C-'s 50