Bonjour
A = 8/9 : 24/3
A = 8/9 x 3/24
A = 24/216
A = (24 x 1) / (24 x 9)
A = 1/9
B = 2/3 : 4
B = 2/3 x 1/4
B = 2/12
B = (2 x 1) / (2 x 6)
B = 1/6
C = 2 : 3/4
C = 2 x 4/3
C = 8/3
D = 1 : 5/2 x 5/2
D = 1 x 5/2 x 5/2
D = 5/2 x 5/2
D = 25/4