It depends if there is deviation inherent in your grades. Let's take two students' grades:
Student 1:
9, 12, 12, 12, 12 = 11.4 = ((3+1/3)+4+4+4))/5 = 3.867
Student 2:
11, 10, 12, 12, 12 = 11.4 = (3.9+3.7+4+4+4)/5 = 3.92
While both students have the same "average" on a 12 point scale, their 4.0 equivalent GPA is different.
Also, that conversion chart is obsolete. Queen's uses a 4.3 scale, 85-90 (4.0), 90+ (4.3).
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