This is the official grading scale according to the RPO. There are 110-120 percent possible on all courses I teach.

Percent Grade Percent Grade
95 ≤ p 1,0 65 ≤ p < 70 3,0
90 ≤ p < 95 1,3 60 ≤ p < 65 3,3
85 ≤ p < 90 1,7 55 ≤ p < 60 3,7
80 ≤ p < 85 2,0 50 ≤ p < 55 4,0
75 ≤ p < 80 2,3 0 ≤ p < 50 5,0
70 ≤ p < 75 2,7