bonjour
logement = 1/3 donc restent 2/3
nourriture = 2/3 x 2/5 = 4/15
transport = 2/3 x 1/10 = 2/30
factures = 2/3 x 1/5 = 2/15
1/3 + 4/15 + 2/30 + 2/15 = 10/30 + 8/30 + 2/30 + 4/30 = 24/30
il reste 6/30 ou 540 €
6/30 = 540
30/30 = ( 30 x 540) : 6 = 2 700
elle gagne 2 700 €