that's 100 percent of one ten thousanth, %‱. Times were hard.
(,
Tue 18 Jan 2011, 4:09,
archived)
It would seem that the 17th and 18th centuries were particularly foul, yet in the 19th century, people became intolerably constipated, and only recently have they found relief!
(,
Tue 18 Jan 2011, 5:31,
archived)