Réponse :
Bonsoir
Explications étape par étape
E = 9/5 X 35/18
E = 315/90
E = 63 /18 : 9/9 = 7/2
F = 4/17 : 12/17
F = 4/17 X 17/12
F = 68/204
F = 34/102 = 17/51 = 1/3
G = (3/4 +2/5) X 15/23
G = (3/4 X 5/5 +2/5 X 4/4) X 15/23
G = (15/20 +8/20) X 15/23
G = 23/20 X 15/23
G = 345/460 : 5/5 = 69/92
