Why do we round up 0.5000 to 1 instead of rounding down to 0?

Question

Why do we round up 0.5000 to 1 instead of rounding down to 0?

In: 12

Answer 1

Zero is net zero, however .5 is *not* zero, therefore a rounding factor is *more accurate* than no factor, or no accounting for the factor (in a case of say 1.205 being rounded to 1.21)