Respostas

2014-04-26T13:14:05-03:00
45/63 (ambos divisíveis por 3): 15/21 -> 5/7
75/30 -> 25/10 -> 5/2
42/105 -> 14/35 -> 2/5
2 3 2
2014-04-26T13:15:41-03:00