Réponse:
A = 33/46
B = 45/77
C = 38/21
D = 21/100
E = 2/5
F = 3/2
G = 4/9
H = 28/81
I = - 25/63
J = 40/3
K = - 8
L = 3
M = 125/4
N = 19/7
O = 113/45
P = 10/3
