0,1(2) = 12-1 = 11/90 90 1,12(3) = 1 123-12 = 1 111/900 900 7,5(4) = 7 54-5 = 7 49/90 90 8,7(21) = 8 721-7 = 8 714/990 = 8 119/165 990