Bonjour
G = 7/3 - 2/3 x 5/4
G = 7/3 - (2 x 5)/(3 x 4)
G = 7/3 - (2 x 5)/(3 x 2 x 2)
G = 7/3 - 5/(3 x 2)
G = 7/3 - 5/6
G = (7 x 2)/(3 x 2) - 5/6
G = 14/6 - 5/6
G = 9/6
G = (3 x 3)/(2 x 3)
G = 3/2