Experience (also referred to as EXP) is what is used to level up your Heroes. Experience points are not the same if you are using 6 heroes instead of one. Experience points are used by this formula (not proven, but my testing shows): n being the number of heroes, p being the number of points distributed to each hero, and t being the experience from the room. p = t / n.
To find the percentage, you want p = n / t.
(Any additional information to this page is accepted.)
|Number of Heroes||Percentage of EXP|