Depends on the institution..
Grade Grade Point Per Cent Range Description
A+ 9 90-100 Exceptional
A 8 80-89 Excellent
B+ 7 75-79 Very Good
B 6 70-74 Good
C+ 5 65-69 Competent
C 4 60-64 Fairly Competent
D+ 3 55-59 Passing
D 2 50-54 Marginally Passing
E 1 (marginally below 50%) Marginally Failing
F 0 (below 50%) Failing
http://calendars.registrar.yorku.ca/2012-2013/academic/grades/