Ah, numbers,numbers! They can drive you mad!
However, try to cast your mind back a few thousand years. All numbers were whole numbers! There was no way that we could write down, a half, or a quarter. Try it with Roman numerals! You cannot split the numbers!
Even after most of the known world began using the Arabic alphabet; the whole numbers could not really be split into fractions.
Until a brilliant Indian mathematician discovered the most powerful number of all; the Zero!