It signifies how perfectly the student is performing in the disciplines. As pointed out, it is the equivalent in the GPA. It may be calculated by the next 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