This would be a C+.
65
100% or A+
If you mean 100% grade, the answer is a 45 degree angle.
A+
The best grade should be a 100.
89% B+
67 rounds to 100 whatever grade you're in.
100/100 is the maximum grade that you can get in French.
Fail.
The answer depends on the grade boundaries.
Assuming you only had a single grade of 100, a second grade of 40 would give you an average of 70. The grade corresponding to that would depend on what range of percentages corresponds to what grade.
about 90