Bonjour,
A = - 24/21 : - 32/14
A = - 24/21 x - 14/32
A = 336/672
A = (336 x 1) / (336 x 2)
A = 1/2
B = 45/- 18 : 15/12
B = - 45/18 x 12/15
B = - 540/270
B = (270 x - 2) / (270 x 1)
B = - 2
C = - 17/27 : - 34/- 21
C = - 17/27 x 21/34
C = - 357/918
C = (51 x - 7) / (51 x 18)
C = - 7/18.
D = 39/- 42 : - 26/56
D = - 39/42 x - 56/26
D = 2 184/1 092
D = (1 092 x 2) / (1 092 x 1)
D = 2.
