Answer:
1÷(5/2×(2×(8-2/5)-1))
1÷(5/2×(2×(6/5)-1))
1÷(5/2×(12/5-1))
1÷(5/2×7/5)
1÷(35/10)
1÷35/10
1×10/35
10/35
2/7
8.7m questions
11.3m answers