But it doesn't mean / 100, it means "per 100" as described here in "The history of the percent sign" http://www.shadycharacters.co.uk/2015/03/percent-sign/ ht

But it doesn't mean / 100, it means "per 100" as described here in "The history of the percent sign" http://www.shadycharacters.co.uk/2015/03/percent-sign/ http://www.shadycharacters.co.uk/2015/03/percent-sign/