It signifies how well the student is carrying out with the disciplines. As stated, it's the equal of the GPA. It can be calculated by the following formula: C R = ∑ k = 1 N C C i ⋅ f ( N i ) ∑ k = 1 N C C i displaystyle CR=textstyle frac textstyle sum _ k=1 ^ NC C_ i cdot f(N_ i )displaystyle textstyle sum _ k=1 ^ NC C_ i displaystyle display