Bonjour aider moi svpl​

Explications étape par étape:

13/2 - 5/12 = 73/12

73/12 - 5/12 = 17/3

17/3 - 5/12 = 21/4

21/4 - 5/12 = 29/6

29/6 - 5/12 = 53/12

53/12 - 5/12 = 4

4 - 5/12 = 43/12

43/12 - 5/12 = 19/6

19/6 - 5/12 = 11/4

11/4 - 5/12 = 7/3

7/3 - 5/12 = 23/12

23/12 - 5/12 = 3/2

3/2 - 5/12 = 13/12

13/12 - 5/12 = 2/3

2/3 - 5/12 = 1/4