Pouvez m aider s il vous plait à réduire au Max ces fractions avec les étapes?

Bonjour,

A = - 5/8 + 7/12

A = (- 5 x 6) / (8 x 6) + (7 x 4) / (12 x 4)

A = - 30/48 + 28/48

A = - 2/48

A = (2 x - 1) / (2 x 24)

A = - 1/24

B = - 14/12 x 18/35

B = - 252/420

B = (84 x - 3) / (84 x 5)

B = - 3/5

C = 1/2 - 1/5 : 6

C = 1/2 - 1/5 x 1/6

C = 1/2 - 1/30

C = (1 x 15) / (2 x 15) - 1/30

C = 15/30 - 1/30

C = 14/30

C = (2 x 7) / (2 x 15)

C = 7/15

D = (3/4 - 2/5) / (2 + 1/3)

D = [(3 x 5) / (4 x 5) - (2 x 4) / (5 x 4)] / [(2 x 3) / (1 x 3) + 1/3]

D = (15/20 - 8/20) : (6/3 + 1/3)

D = 7/20 : 7/3

D = 7/20 x 3/7

D = 21/140

D = (7 x 3) / (7 x 20)

D = 3/20

E = 1/3 : (2 - 3/7)

E = 1/3 : [(2 x 7) / (1 x 7) - 3/7]

E = 1/3 : (14/7 - 3/7)

E = 1/3 : 11/7

E = 1/3 x 7/11

E = 7/33