@jsbuser Your view reminds me Zeno's paradox. Any way, your calculation is that you always subtract finite 9s from 1. That is : 1 - 0.99999....9 = 0.000....1 You can imagine any big number but it stops (not never repeating forever) at what you are given. Of course, if you subtract 0.999...9 (finite 9s regardless how large it is) from 1, the result is always greater than 0 (which is 1 ≠ 0.999...9). It is not the original question.
