The K Desktop Environment

3.2. %

Used instead of the = key, % interprets the final operation carried out in the current calculation as follows:

Examples:

45 / 55 % gives 81.81... (45 is 81.81.. percent of 55)

11 + 89 % gives 112.35.. (89 + 11 = 100, and 100 is 112.35 percent of 89)