Express the following in the form \( \frac{p}{q} \), where \( p \) and \( q \) are integers and ...

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Express the following in the form \( \frac{p}{q} \), where \( p \) and \( q \) are integers and \( q \neq 0 \).
(i) \( 0 . \overline{6} \)
(ii) \( 0.4 \overline{7} \)
(iii) \( 0 . \overline{001} \)
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