Помогите с примером (4,2 :1,2-1,05)*1,6

Не правильное решение"!!!

1) 35/722)4/27*9/16 = 1/3*1/4 = 1/123)1 7/33 * 1 7/15 = 40/33 * 22/15 = 8/3*2/3 = 10/9 = 1 1/94) 5 5/6 * 2 4/7 = 36/6 * 18/7 = 5/1*3/1 = 5*3 = 155)1 5/12 * 24 = 17/12 * 24/1 = 17/1 * 2/1 = 17*2 = 34