Bonjour
2)
3 = 3/1 = 15/5
7 = 7/1 = 28/4
5 = 40/8 = 15/3
2,14 = 214/100 = 107/50
5/8 = 35/56 = 15/24
20/15 = 4/3 = 24/18
7/3 = 35/15 = 42/18
25/55 = 5/11 = 40/88
2/9 = 6/27 = - 8/- 36
14/21 = 2/3 = - 10/- 15
12/30 = 2/5 = 18/45
36/24 = 6/4 = 3/2
3)
5/3 = 30/18 = 15/9 = 25/15
car 30/18 = (6 x 5) / (6 x 3) = 5/3
car 15/9 = (3 x 5) / (3 x 3) = 5/3
car 25/15 = (5 x 5) / (5 x 3) = 5/3
40/12 = (4 x 10) / (4 x 3) = 10/3
10/8 = (2 x 5) / (2 x 4) = 5/4
