3 repeating is NOT a fraction ' 3333333....'
However, if you mean 0.3333.... Then to convert to a fraction.
Let P = 0.3333....
&
10P = 3.3333.....
Subtract
9P = 3 (NB THe repeating decimals subtract to zero)
P = 3/9
Cancel down by '3'
P = 1/3
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