Bonsoir
A = 5 : 3/4
A = 5 x 4/3
A = 20/3
B = 1 : 7/12
B = 1 x 12/7
B = 12/7
C = 13 : -7/11
C = 13 x -11/7
C = -143/7
D = -4 : -7/3
D = -4 x 3/7
D = 12/7
