Express $0 . \overline{3}$ in the form of a fraction.
1/3
2/5
1/7
2/3
$0 . \overline{3}=0.3333 \quad \rightarrow(1)$
As the period is of one digit, we multiply by 101 i.e.10
$\therefore 10 \times{0.\overline{3}}=3.333 \quad \rightarrow(2)$
(2) - (1) gives
$9 \times {0 . \overline{3}}=3 \Rightarrow 0 . \overline{3}=3 / 9=1 / 3$