2.2/3:2+(4/15+2/5):(3.1/3×3/5)помогите решить

Question

2.2/3:2+(4/15+2/5):(3.1/3×3/5)помогите решить

Answer 1

2,2/3:2+(4/15+2/5):(3,1/3×3/5)=8/3:2/1+(4/15+6/15):(10/3×3/5)=8/3×1/2+(10/15:10/5)=4/3+(10/15×5/10)=4/3+1,3=5/3=1,2/3