Bonsoir pourriez-vous m’aider pour le dernier svp. Merci

A = 21/70 = 3/10
B = 74/40 = 37/20
C = 30/60 = 1/2
D = 73/60
E = 135/150 = 27/30
F = 96/72 = 48/36 = 24/18 = 12/9 = 4/3
G = 420/420 = 1
H = 156/12 = 78/6 = 39/3 = 13

J'espere t'avoir aidé, un merci me ferais plaisir, bonne soirée !