Bonjour,
49)
a. 2/7 : 3/5 = 2/7 x 5/3 = 10/21
b. - 5/4 : 9/- 11 = - 5/4 x - 11/9 = 55/36
50)
a. - 7/6 : 3/4 = - 7/6 x 4/3 = - 28/18 = (2 x - 14) / (2 x 9) = - 14/9
b. 3/8 : - 3/4 = 3/8 x - 4/3 = - 12/24 = (12 x - 1) / (12 x 2) = - 1/2
c. - 5/9 : - 8/3 = - 5/9 x - 3/8 = 15/72 = (3 x 5) / (3 x 24) = 5/24.
