Réponses

  • Utilisateur Brainly
2014-03-15T11:22:27+01:00
18/120 =.....= ..../100 
18/120=9/60=3/20=15/100 

et l'autre :
2/5=.....=.../690

2/5=40/100=276/690
2014-03-15T11:28:02+01:00
18/120 = 6 x 3 / 6 x 20 = 3/20 = 15/100 

2/5 = 2 x 138 / 5 x 138 = 276/690