A    94%-100%

A-   92%-93%

B+  90%-91%

B    84% - 89%

B-   82%-83%

C+  80%-81%

C   74% - 79%

C-  72%-73%

D+ 70%-71%

D   64 %- 69%

D-  62%-63%

F   0% - 61%