Bonsoir,
54/45 = 6/5
28/42 = 14/21 = 2/3
12/15 = 4/5
4/6 = 2/3
50/40=5/4
4/36 = 1/9
27/54= 9/18 = 1/2
36/4 = 9
Tu as tout ce qu'il te faut
