A

100-93%

C

76.9-73%

A-

92.9-90%

C-

 72.9-70%

B+

89.9-87%

D+

69.9-67%

B

86.9-83%

D

66.9-63%

B-

82.9-80%

D-

62.9-60%

C+

79.9-77%

F

59.9-0%