Let F = 0.122222....
then 10F = 1.222222.....
Subtracting the first from the second: 9F = 1.1
So that F = 1.1/9 = 11/90
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2/111
If you mean: 0.181818.....18 repeating then as a fraction it is 2/11
It is: 2/9 = 0.2222 .... repeating 2
0.2 a repeating decimal into a fraction = 2/9
2/9