Réponse :
a :
4/6 = 2/3
16/4 = 4/1 = 4
12/9 = 4/3
30/15 = 2
7/21 = 1/3
50/30 = 5/3
29/42 = impossible de simplifier +
84/30 = 14/5
2/13 = impossible de simplifier +
7/49 = 1/7
51/34 = 3/2
b :
420/168 = 5/2
400/180 = 20/9
1485/1584 = 15/16
Explications étape par étape
