3 целых 17/20÷(3 целых 2/5+1целая 11/15)

Question

3 целых 17/20÷(3 целых 2/5+1целая 11/15)

Answer 1

77/20÷(17/5+26/15)=77/20÷(51/15+26/15)=77/20÷77/15=77/20×15/77=15/20=
=3/4