Question
Express 
in the form of 
where p and q are integers and q ≠ 0.
Solution
Let 
Then, x = 0.001 001 001 001...... ...(1)
⇒ 1000x = 1.001 001 001 001...... ...(2)
Subtracting (1) from (2), we get
99x = 1
