What percentage did J.K Rowling get for the Harry Potter books?

The money is depending on how much i am in need of a book or firewood. This will also depend on the time of month depending on my weather precautions, or what the cat dragged. further more, if the cat were to drag in a JK Rowling Harry Potter book i would spit upon it having no regrets to the michevious act that I've put down on that bad boy. So considering my investigation, probably ALOT of money and 7 Fajihta's considering the male Mexican population of cats and whales.