30-23,1:(5*7/20-4*6/35)

Question

30-23,1:(5*7/20-4*6/35)

Answer 1

1) 5 7/20-4 6/35=107/35-146/35=165/140=1 5/8
2) 23 1/10:1 5/8=231/10×8/13=14 14/65
3) 30-14 14/65=30/1-924/65=1026/65=15 51/65