Also, for those who don't know such things, rolling a percentile means rolling two ten-sided dice of different colors, calling one of them the "tens" and the other the "ones" (two zeros is considered a 100). Michael (who is playing Subotai) refers to the red die as being the "tens."
Unless you have a d100 or a d10 that has 10,20,30,...,00 on it.
