The unit is the dollar, the penny a fraction thereof ... if years ago before considerable inflation [see, oh yes, they can be destroyed!] we made do with rounding off to the penny, instead of tenths or hundredths of the penny, then we could today easily take it to the tenth of the dollar, and stop there ... for the purposes of transactions only, of course in computations for other purposes you could use as many decimal points as you wish, or as your calculator allows ... land taxes have always been computed in mils, thousandths of a dollar, yet you round off to the nearest penny when you write the cheque, so it's the same thing, just now let's round off to the dime, and eliminate two coins
Another way to do it is lop three zeros off the dollar, this is what México did with the peso in '93 .... trouble is you have to print/mint all new currency, to differentiate between old and new ... nah, better to go the other way, call in the pennies and nickels and melt them down into twenty-dollar coins, say the size of the current nickel |