When 9 is

2 x 9 = 18

1+8 = 9

3 x 9 = 27 

2+7 = 9

4 x 9 = 36 

3+6 = 9

5 x 9 = 45 

4+5 = 9

6 x 9 = 54

5+4 = 9

7 x 9 = 63

6 +3 = 9

8 x 9 = 72

7 +2 = 9

and so on forever

multiplied, it always reproduces itself.

 

If 9 is the denominator and 1 to 8 is the numerator, when you change the fraction into decimal form, it’s amazing