Bonjour,
A= 5/7 -15/28
= 20/28 - 15/28 = 5/28
B = (3/4 )/ (5/14)
= 3/4 * 14/5 = 42/20= 21/10
C= (5/2)/ (24/7)
= 5/2 * 7/24 =35/ 48
D= 1/3 * ( 4/5 + 15/5)
= 1/3 * 19/5
= 19/15
E= 3 - 49/4
= 12/4 -49/4
= -37/4
F= 6/12 - 9/12 + 10/12
= 7/12
A= -5/4 + 2/4
= -3/4 = -9/12
B= -5/12
A < B
