Question

30:(5-21/26•5 1/5:1 1/5)

Answer 1

30:(5-21/26*5 1/5:1 1/5)=
1) 21/26*5 1/5 = 21/25
2) 21/25: 1 1/5= 7/10
3) 5-7/10= 4 3/10
4) 30: 4 3/10= 6 42/43