Armor Set Bonus

Armor Set Bonus is a bonus a character gets from the worn armor set. See Armor Sets for details.

In sets the bonus is shown in %, but keep in mind that it is added on top, i.e. +4% is 104% when multiplied.
Example: +4% P. Atk in Draconic Leather Light Armor Set is counted by the game as the number 1.04 in the formulas.