( 2 1/7 + 1 2/3 ) /5

Question

( 2 1/7 + 1 2/3 ) /5

Answer 1

1)21:7=3
2)12:4=4
3)4+3=7
4)7:5=1,4

Answer 2

(2 1\7+1 2|3)\5=
 (15\7+5\3)\5=(45+35\21)\5=80\21\5=81\21:5=80\21*1\5=16\21