# Question #d237f

##### 1 Answer

Jan 26, 2015

I'd say 99.

In fact, a periodic number like

So, for example, 0.125125125.. will be given by

So, any 2-digits number

Note that this works in some "strange" cases:

- by choosing
#xy=0# , one has that#0/99=0# , which you can read as 0.000.... - for any number from 1 to 9, this formula works if you remember that you are thinking of them as a 2-digits number, so 1 is 01, 2 is 02, and so on. In fact you have that, for example,
#5/99=0.0505...# - Probably the trickiest point is that, even though you asked
#xy<ab# , this actually works also for#xy=99# . In fact,#99/99# is of course 1, but#1=0.99...#