0
Presumably you want to convert that into a fraction. Here is an example.
Your number is 0.4121212... ("12" is repeated)
Call this "x":
x = 0.4121212...
Multiply this by 100 (if three digits repeat, multiply by 1000, if 4 digits repeat, by 10,000, etc.), and subtract:
100x = 12.21212...
x = 0.41212...
99x = 11.8
Therefore, x = 11.8 / 99 = 118/990.
The final step is to see whether you can simplify the fraction.
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