0.0111
It's 1/90th or 0.01111 (rounded, repeating)
Note:
The answer doesn't depend on how you find it. If you do the problem two different
ways and get two different answers, then at least one of them is wrong.
9 divided by 810 is 1/20 or 0.05
0.0111
9*9 = 81 81*10 = 810 so 9*90 = 810 and, therefore, 810/9 = 90
9
0.0207
0.0061
0.8889
0.8889
0.0166
5400 divided by 9 is 600 with remainder 0.
0.125
2.25