Bonjour vous prouvez me faire le 30 svp !

Exercice 30:

a) 30/42 = 6x5 / 6x7 = 5/7
14/63 = 7x2 / 7x9 = 2/9
40/44 = 4x10 / 4x11 = 10/11
81/18 = 9x9 / 9x2 = 9/2

b) 26/39 = 13x2 / 13x3 = 2/3
51/85 = 17x3 / 17x5 = 3/5
115/161 = 23x5 / 23x7 = 5/7
363/605 = 121x3 / 121x5 = 3/5