a Germ-X Percent
A lie told by people who think '99.99%' sounds cooler than '99%'.
'99.99% effective!' Bro, I've had 99% of my brain taken by video games, and I'm still alive.
My uncle claims he used Germ-X and never got sick. He also claims he can breathe underwater.
99.99% is just 99% with a little extra nonsense.