If you mean 0.222.... recurring to infinity.
Then the answer is 2/9
How do we go there?
Let
P = 0.222.... &
10P = 2.2222....
Subtract
9P = 2.0
P = 2/9
NB Notice what the multiplication by '10' does.
NNB Notice also that subtraction of recurring decimals to infinity reduces to zero.
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Every fraction is an equivalent fraction: each fraction in decimal form has an equivalent rational fraction as well as an equivalent percentage fraction.
A fraction that has a different sign to the first fraction.
Divide the fraction by 100, and you will get the percentage of a fraction.
Or both. That's a complex fraction.
The number below the fraction bar in a fraction is the denominator. The number above the fraction bar is the numerator.