Помогите решить пример. (3,6-1 2/3):(4 1/15-2 7/9)

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(3 6/10 - 1 2/3): (4 1/15 - 2 7/9) = (3 3/5 - 1 2/3):(4 1/15 - 2 7/9) = (3 9/15 - 1 10/15):(4 3/45 - 2 35/45) = (2 24/15 - 1 10/15):(3 48/45 - 2 35/45) = (1 14/15):(1 13/45) = (29/15):(58/45) = (29/15) * (45/58) =  3/2 = 1,5