Decimal only takes care of a subset of cases. I.e. those where the source data nicely lines up in decimal. Good for finance (although I think Britain made a m

Decimal only takes care of a subset of cases. I.e. those where the source data nicely lines up in decimal. Good for finance (although I think Britain made a mistake when it gave up the old penny and the shilling). But even there, you sometimes have to divide by numbers like 12 and 365. The point is NO representation is going to be idiot proof. So you just need to make a sufficient set of representations easy to use, and then try to teach the "idiots" what the underling issues are.