Bonjour
A = - 5/7 : 3/4
A = - 5/7 x 4/3
A = - 20/21
B = 25/- 8 : (- 15/- 4)
B = - 25/8 x 4/15
B = - 100/120
B = (20 x - 5) / (20 x 6)
B = - 5/6
C = - 15/7 : 5/-4
C = - 15/7 x - 4/5
C = 60/35
C = (5 x 12) / (5 x 7)
C = 12/7
D = 5/- 3 : - 7/2
D = - 5/3 x - 2/7
D = 10/21
E = - 70/12 : 14/- 6
E = - 70/12 x - 6/14
E = 420/168
E = (84 x 5) / (84 x 2)
E = 5/2
F = - 1,2/15 : 1,8/40
F = - 1,2/15 x 40/1,8
F = - 48/27
F = (3 x - 16) / (3 x 29)
F = - 16/29.
