Bonjour pourrais vous m'aidez

a) 0/8 = 0 ; 1/8 ; 2/8 = 1/4 ; 3/8 ; 4/8 = 1/2; 5/8 ; 6/8 = 3/4 ; 7/8 et 8/8 =1
b) 1-5/8 = 8/8-5/8 = 3/8 il reste 60x5/8 = 37,5 L
c) 5/8x3/4 = 15/32 
   fraction totale consommée = 15/32+3/8 = 15/32+12/32 = 27/32 
d) 1-27/32 = 32/32-27/32 = 5/32
il reste 60x5/32 = 9,375 L

Exercice 2
a)
1er jour : 1/2
2è jour : 1/2x1/2 = 1/4
3è jour : 1/2x1/2x1/2 = 1/8
1/2+1/4+1/8 = 4/8+2/8+1/8 = 7/8
b)
1-7/8 = 8/8-7/8 = 1/8