Réponse:
28/12 = 7/3
38/42 = 19/21
60/44 = 15/11
31/93 = 1/3
34/22 = 17/11
15/12 = 5/4
200/70 = 20/7
57/19 = 3/1
25/45 = 5/9
25/100 = 1/4
Réponse :
28/12 = 4x7/4x3 = 7/3
38/42 = 19/21
60/44 = 30/22= 15/11
31/93 = 1/3
34/22 = 17/11
15/12 = 5/4
200/70 = 20/7
57/19 = 3
25/45 = 5/9
25/ 100 = 1/4
Explications étape par étape