n= .81 repeating
100n = 81.81
-1n -1n
99n= 81
81/99
81 over 99 is the final answer.
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081 = 81/1
If you mean: 0.'081' recurring '081' then as a fraction in its simplest form 3/37
0.78 repeating as a fraction = 78/99
What is 1.49 repeating (9 is repeating)
0.54 repeating as a fraction = 54/99 or 6/11