Hello
G = 2/3 * 4/5
= 8/15
H = 7/2 * 2*2/9
= 14/9
I = 3 * 7/5
= 21/5
J = (8*2) / (9 * 3.) * ( 5 * 9) / 8
= 2/3 * 5
= 10/3
bonne journée