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

(3/4-5/12)*3-1/6:1/8=3/ 4 - 5 /12 = 3·3/ 4·3 - 5·1/ 12·1 = 9 /12 - 5/ 12 = 9 - 5 /12 = 4 /12 = 1·4 /3·4 = 1 /31/3 *3 - 1/6:1/8 =1/ 6 ÷ 1/ 8 = 1/ 6 × 8/ 1 = 1·8/ 6·1 = 8/ 6 = 4·2/ 3·2 = 4/ 3 = 1 + 1·3 3 = 1 1/ 33/3 - 4/3 = - 1/3(3/4-5/12)*3-1/6:1/8= - 1/3