Talking, I would say 'a thousandth' or 'a tenth of a p.c'. Making use of 'a' rather then 'just one' in saying It appears nicer. Further, in exposition, 'a' is definitely an indefinite post, which implies the speaker won't know the id on the noun, in this case the thousandth in particular.As its examples exhibit, Chicago endorses "10 per cent" in ma