The CFS audience rating system is one used by all similar clubs in the British Federation of Film Societies. The votes in each category (A - best, B, C, D and E - worst) are each multiplied respectively by 1, 0.75, 0.5, 0.25 and 0 and the resulting sum then divided by the number of votes cast, and converted to a percentage.  This percentage gives a basis for showing which films were liked better than others.