(3/4-5/12)*3-1/6:1/8 3/4- дробь! Помогите безотлагательно:3

(3/4-5/12)*3-1/6:1/8=
3/ 4 - 5 /12 = 33/ 43 - 51/ 121 = 9 /12 - 5/ 12 = 9 - 5 /12 = 4 /12 = 14 /34 = 1 /3
1/3 *3 - 1/6:1/8 =
1/ 6 1/ 8 = 1/ 6 8/ 1 = 18/ 61 = 8/ 6 = 42/ 32 = 4/ 3 = 1 + 13 3 = 1 1/ 3
3/3 - 4/3 = - 1/3
(3/4-5/12)*3-1/6:1/8= - 1/3