d%

A form of d100 — A die roll used for example in some role-playing games and wargames to generate a random number between 1 and 100. The most common method is to roll 2 differently colored d10s, where each color has been designated to represent one of the two digits. (Rolls of 10 are treated as the digit 0. Double-0 can be treated as zero or 100, depending on the context.)