Réponses

2014-01-27T17:35:14+01:00
15/60 = (3*5)/(3*30) = 5/(5*4) = 1/4

5/60 = 5/(5*12) = 1/12

28/60 = (4*7)/(4*15) = 7/15

12/60 = (3*4)/(3*5*4) = 1/5

45/108 = (9*5)/(9*12) = 5/12

104/140 = (4*26)/(4*35) = 26/35

150/210 = (10*3*5)/(10*3*7) = 5/7