Выполним сравнение дробей:
9*3/13*13 = 27/169
7*7/12*9 = 49/108
9*3/18*6 = 27/108 = 1/4
5*1/8*4 = 5/32
11*11/13*17 = 121/221
2*4/12*24 = 8/288 = 1/36
5*3/17*17 = 15/289
3*1/7*5 = 3/35
5*3/10*6 = 15/60 = 1/4
8*8/10*9 = 64/90 = 32/45
13*39/15*45 = 507/675 = 169/225
4*1/9*9 = 4/81
5*1/8*4 = 5/32