The pattern in the decimal form of ninths

Investigation 1: Is there a pattern in the decimal form of ninths?

Hypothesis:

As 7/9, 0.77777…, and 8/9, 0.88888…, are very similar in their decimal forms, I believe that there will be a pattern in the decimal form of ninths.

Results:

Number of NinthsDecimalDoes It Follow The Pattern?
10.11Yes
20.22Yes
30.33Yes
40.44Yes
50.56Yes
60.67Yes
70.78Yes
80.89Yes
91.00Yes
101.11Yes
111.22Yes
121.33Yes
131.44Yes
141.56Yes
151.67Yes
161.78Yes
171.89Yes
182.00Yes
192.11Yes
202.22Yes
212.33Yes
222.44Yes
232.56Yes
242.67Yes
252.78Yes
262.89Yes
273.00Yes

Conclusion:

The whole numbers (0, 1 and 2) show the amount of complete nines. For example 9 ninths is equal to 1 complete 9 and 18 ninths is equal to 2. This is why they are shown as 1.00 and 2.00.

The numbers following the decimal place show the fraction of the whole nine remaining. These decimals, except 0, are recurring, making the number infinitely long. However, these numbers have been rounded up and down to 2 decimal places. Numbers like 1.89 and 0.56 have been rounded up and the second decimal is always 1 more than the first. Meanwhile, numbers rounded down repeat the first decimal and include 1.22 and 0.44.

This reveals a pattern in the decimal form of ninths. For 1 to 8 ninths, the recurring number after the decimal place is the same as the amount of ninths. From 10 to 17 ninths, the decimal is 1 more than the amount of ninths shown in the ones column. From 19 to 26 ninths the decimal is two more. 

Investigation 2: Does the pattern in the decimal form of ninths reset?

Hypothesis:

The pattern described above will keep going with the difference between the first decimal and ones column of ninths increasing by 1 after every whole 9 until it reaches 90 ninths. In theory, the pattern should restart here due to 90 being a multiple of 9 that ends in 0.

Results:

Number Of NinthsDecimalDoes It Follow The Pattern
273.00Yes
283.11Yes
293.22Yes
303.33Yes
313.44Yes
323.56Yes
333.67Yes
343.78Yes
353.89Yes
364.00Yes
374.11Yes
384.22Yes
394.33Yes
404.44Yes
414.56Yes
424.67Yes
434.78Yes
444.89Yes
455.00Yes
465.11Yes
475.22Yes
485.33Yes
495.44Yes
505.56Yes
515.67Yes
525.78Yes
535.89Yes
546.00Yes
556.11Yes
566.22Yes
576.33Yes
586.44Yes
596.56Yes
606.67Yes
616.78Yes
626.89Yes
637.00Yes
647.11Yes
657.22Yes
667.33Yes
677.44Yes
687.56Yes
697.67Yes
707.78Yes
717.89Yes
728.00Yes
738.11Yes
748.22Yes
758.33Yes
768.44Yes
778.56Yes
788.67Yes
798.78Yes
808.89Yes
819.00Yes
829.11Yes
839.22Yes
849.33Yes
859.44Yes
869.56Yes
879.67Yes
889.78Yes
899.89Yes
9010.00No
9110.11Yes
9210.22Yes
9310.33Yes
9410.44Yes
9510.56Yes
9610.67Yes
9710.78Yes
9810.89Yes
9911.00Yes

Conclusion:

The table above shows that the pattern does keep going until 90 ninths, with the difference between the ones column of ninths and decimal being 9 between 82 and 89 ninths. Then, the difference resets and becomes 0 once more upon reaching 90 ninths.