Bonsoir j'ai besoin d'aide pour un exercice s'il vous plaît ​

Bonsoir

7/11 / 4/5

= 7/11 x 5/4

= (7 x 5)/(11 x 4)

= 35/44

-2/7 : 3/4

= -2/7 x 4/3

= (-2 x 4)/(7 x 3)

= -8/21

-2/3 : 14/-5

= -2/3 x -5/14

= (2 x 5)/(3 x 14)

= (2 x 5)/(3 x 2 x 7)

= 5/(3 x 7)

= 5/21

-4/-5 : 6/-15

= 4/5 x (-15/6)

= (-4 x 15)/(5 x 6)

= (-2 x 2 x 3 x 5)/(5 x 2 x 3)

= (-2)/1

= (-2)

8/-5 : 4/-3

= 8/5 x 3/4

= (8 x 3)/(5 x 4)

= (2 x 4 x 3)/(5 x 4)

= (2 x 3)/5

= 6/5

-10/-9 : 5/-3

= 10/9 x (-3/5)

= (-10 x 3)/(9 x 5)

= (-2 x 5 x 3)/(3 x 3 x 5)

= -2/3

-(-2/-11) : -6/-7

= (-2/11) x 7/6

= (-2 x 7)/(11 x 6)

= (-2 x 7)/(11 x 2 x 3)

= -7/(11 x 3)

= -7/33

-7 : 10/-21

= 7 x 21/10

= 147/10

-8/-7 : (-6)

= -8/7 x 1/6

= (-2 x 4 x 1)/(7 x 2 x 3)

= -4/21