One ninth written as a decimal is 0.1111, with the 1 repeating indefinitely. This is because when you divide 1 by 9, the result is a recurring decimal where the digit 1 repeats infinitely.
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.111...The ones keep repeating.0.1111111 . . .
One ninth (1/9) is represented in decimal notation by the number 0.111... which can also be written as 0.1(rec) or 0.1 with a small dot or horizontal line above the '1'.This can also be written as '0.' followed by any number of '1's. There is no way to write down this number in its entirety, as there are infinitely many '1's following the decimal place. This number is said as "zero point one, recurring".
billionths
1/3
1/9 / 4 = 1/36 or one thirty-sixth. Expressed as a decimal, this is equal to 0.027 recurring (that is, 0.027777...)