Réponse :
Propriété : Diviser deux fractions, c'est multiplier la première fraction par l'inverse de la deuxième.
A = (5/7) / (15/2) = (5/7) X (2/15) = 10 / 105
B = (4/3) / (7/9) = (4/3) X (9/7) = 36 / 21
C = (12/5) / (6/7) = (12/5) X (7/6) = 84 / 30
D = (9/2) / (3/4) = (12/5) X (4/3) = 48 / 15
E = (3/5) / (-9/25) = (3/5) X (25/-9) = 75 / -45
F = (7/16) / (5/4) = (7/16) X (4/5) = 28 / 80
G = (10/7) / (30/14) = (10/7) X (14/30) = 140 / 210
H = (25/8) / (15/4) = (25/8) X (4/15) = 100 / 120
J = (-2/3) / (4/27) = (-2/3) X (27/4) = -54 / 12
K = (24/35) / (18/49) = (24/35) X (49/18) = 1176 / 630
Explications étape par étape :
En espérant t'avoir aidé ^^
