It signifies how well the student is carrying out for the disciplines. As mentioned, it is the equivalent from the GPA. It may be calculated by the next method: C R = ? k = one N C C i ? file ( N i ) ? k = one 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 di