Question

Express 3.127 (only 7 has bar) in p/q firm

Answer 1

let x=3.127777...
100x=312.7777 (equation 1)
1000x=3127.7777.. (equation 2)
now,
subtracting equation 1 & 2.
1000-100x=3127.77..-312.7...
=900x=28150
=x=28150/900
=x=935/3