I'm just being curious, i have seen on some places, statistical results where they give them in form of "10 of 100.000" or "5 of every 10".

I dont have any statistical knowledge over my personal experience/reading around. But basic maths tell me that such values could be simplified as any fraction we used to do:

10 of 100.000 -> 1 of 10.000 // 5 of every 10 -> 1 of every 2.

Is there any reason to dont do it?

Thanks in advance