Question

[(1-1/2):3/4]+[1/5:(1-4/5)2]

Answer 1

1-1/2) / 3/4 + 1/5 / (1-4/5)²

(2/2-1/2) / 3/4 + 1/5 / (5/5-4/5)²

1/2 / 3/4 + 1/5 / (1/5)²

1/2 . 4/3 + 1/5 / 1/25

4/6 + 1/5 . 25/1

2/3 + 25/5

2/3 + 5/1              (mmc = 3)

2/3 + 15/3 = 17/3