25 100% A+
24 96% A
23 92% A-
22 88% B+
21 84% B
20 80% B-
19 76% C
18 72% C-
17 68% D+
16 64% D
15 60% D-
14 56% F
13 52% F
12 48% F- v
11 44%
10 40%
9 36%
8 32%
7 28%
6 24%
5 20%
4 16%
3 12%
2 8%
1 4%
0 0%