Having gone through complete decimalisation/metrication here in Australia over the last
forty years I find most of the arguements above very familiar, about the only one that I
haven't seen yet is the senior citizen one: "They shouldn't do this decimalisation until
all we old people have died." That is not to say that some of the points made don't have
merit, but the only thing to do once a government has made up its mind to convert is to
learn the new system, even if it's only just as much as you must know for everyday use.
And, by-the-way, the speed conversion between miles and kilometres is 5/8 or 8/5, that is,
to convert miles to k's you divide by five and multiply by eight, 30 mph is roughly 48kph.