Bonjour
E = - 4/9 x 8 = - 32/9
F = 8/9 x - 2/3 = - 16/27
G = - 15/16 x 12/35 = - 180/560 = (20 x 9) / (20 x 28) = 9/28
H = - 4/21 x 9/- 12 x 28/27
H = 36/252 x 28/27
H = - 1 008/6 804
H = (252 x - 4) / (252 x 7)
H = - 4/7.
