Bonjour
4/3 : (- 5) = 4/3 x - 1/5 = - 4/15 → 4/- 5 x 1/3 = - 4/15
4/- 5 : 1/3 = - 4/5 x 3 = - 12/5 → 4/- 5 x 3 = - 12/5.
4/- 5 : (- 3) = - 4/5 x - 1/3 = 4/15 → 4/3 x 1/5 = 4/15
4 : 3/- 5 = 4 x - 5/3 = - 20/3 → 4 x - 5/3 = - 20/3.
