If a student
earned every grade between "A" and "C-"
on eight grades,

the total of 663 divided into 800 would produce an average
of 82, or a low "B".

To see how perfect
this system is, assume a student got five "A's"
(95 points each) for a total of 475.

Now, divide 475 by the possible total the student would
have earned if they got five "A+'s", which is
500.

475 divided by
500 = 0.95, or 95 (A)

Also try a theoretical
student who got straight A+'s for a total of 500 points
on 5 projects;

500 divided into 500 is 1.0, or 100 (A+)