Réponses

2014-05-20T18:32:22+02:00
2014-05-20T18:40:12+02:00
4/5 = 4*4 / 5*4 = 16/20

45/135 = 5*9 / 15*9 = 5/15 = 1*5 / 3*5 = 1/3

0.85 = 85/100 = 17*5 / 20*5 = 17/20