1.0 1/6 + (5/6-3/4)/ (2/5) = 1/6 + (20/24 - 18/24) / (2/5)
= 1/6 + (2/24) / (2/5)
= 1/6 + (2/24 * 5/2)
= 1/6 + 5/24
= 4/24 + 5/24 = 9 / 24 = 3 / 8
2.0 (4/5 * 1/4 ) + (3.2* 1/4) - (1 / 4) = (1/5) + (16/5 * 1/4) - (1/4)
= (1/5) + (4/5) - (1/ 4)
= 1 - (1 / 4)
= 3 / 4