Bonjour,
E = (-7/5) / [6 + (1/5)]
E = (-7/5) / (30/5 + 1/5)
E = (-7/5) / (31/5)
E = (-7/5) × (5/31)
E = -7/31
F = (3/4) / (7/8) – (3/7)
F = (3/4) × (8/7) – 3/7
F = 24/28 – 3/7 or 24/28 = 6/7
F = 6/7 – 3/7
F = 3/7
G = [(3/2) – (1/4)] / [2 – (1/2)]
G = [(6/4) – (1/4)] / [(4/2) – (1/2)]
G = (5/4) / (3/2)
G = (5/4) × (2/3)
G = 10/12 = (2×5)/(2×6)
G = 5/6
