Aidez moi à rendre irréductible cette fraction svp O= 1-(9/7-5/6x3/7

Bonjour,

O = 1 - (9/7 - 5/6 × 3/7)

O = 1 - (9/7 - (5 × 3) / (6 × 7))

O = 1 - (9/7 - 15/42)

15/42 = (3 × 5) / (14 × 3) = 5/14

O = 1 - (18/14 - 5/14)

O = 1 - (13/14)

O = 14/14 - 13/14

O = 1/14

Bonne journée !