Talking, I'd say 'a thousandth' or 'a tenth of a %'. Applying 'a' instead of '1' in saying It appears nicer. Even further, in exposition, 'a' is really an indefinite write-up, which implies the speaker isn't going to know the id in the noun, in this case the thousandth specifically.Some use phytocannabinoid loaded hemp for anti-inflammatory outcome