Question

3-2/5.{3-2/5.[3-2/5.(1-1/6)]}

Answer 1

3-2/5*{3-2/5*[3-2/5*(1-1/6)]}=
3-2/5*{3-2/5*[3-2/5*(6/6-1/6)]}=
3-2/5*{3-2/5*[3-2/5*5/6]}=
3-2/5*{3-2/5*[3-1/3]}=
3-2/5*{3-2/5*[9/3-1/3]}=
3-2/5*{3-2/5*8/3}=
3-2/5*{3-16/15}=
3-2/5*{45/15-16/15}=
3-2/5*29/15=
3-58/75=
225/75-58/75=167/75=2,22(6)