Dividing 100% by 3 without any left In mathematics, as far as I know, you can't divide 100% by 3 without having 0,1...% left.
Imagine an apple which was cloned two times, so the other 2 are completely equal in 'quality'. The totality of the 3 apples is 100%. Now, you can divide those 3 apples for 3 persons and you will get 100% divided by 3 and none left.
Is this because                                    1: mathematics is not real                   2: there is no 1 or 2, and it's in fact just an invention for measurements? So,  in the division of 100% by 3 WITHOUT any left, is NOT  accurate?

Here, in a practical way – I understand all your concepts, sirs – I was using a simple calculator on my computer, and looks like mine's got a 10 decimal digit precision. Which make this possible:
9 decimal "3s"
33.333333333 * 3
= 99.999999999
10 decimal "3s"
33.3333333333 * 3
= 100
If I divide 100 by 3, it'll give me 10 decimal "3s". And this expression was valid:
100/3 * 3 = 100
