Jelly's Bonus Percent EXP

#===============================================================================
# ** Jelly's Bonus Percent EXP                                            [v1.0]
#    Fourm Post: http://goo.gl/Yllrkk
#-------------------------------------------------------------------------------
#  - Lets you set a percentage to increase/decrease all exp gains by
#===============================================================================
# ** Credit
#-------------------------------------------------------------------------------
#  - Free to use in commercial and otherwise.
#  - A little shoutout to myself is appreciated.
#  - What I do require is that if you complete a game I be allowed to list it as
#    something my work has been included in.  I can be contacted at:
#    aaron.feldman911@gmail.com  Just make sure to have a relevant subject line!
#===============================================================================
# ** Change Log
#-------------------------------------------------------------------------------
#    10/3/15 - v1.0
#           - Initial support
#===============================================================================
# ** Compatibility
#-------------------------------------------------------------------------------
#    This script aliases Game_Actor's change_exp method.
#===============================================================================
# ** Notes
#-------------------------------------------------------------------------------
#  - Currently the message showing how much exp you have gained via battle does
#    not take into account what is gained by the bonus.  Fixing that may however
#    be beyond the scope of the script however.
#===============================================================================
#EDITABLE================EDITABLE===============EDITABLE================EDITABLE
#========EDITABLE================EDITABLE===============EDITABLE================
#================EDITABLE================EDITABLE===============EDITABLE========
# Configuration Module
#-------------------------------------------------------------------------------
module JELLY
  BONUS_SWITCH     = 1 # change this number to the switch you wish to toggle the ability to gain bonus exp
  PERCENT_VARIABLE = 1 # change this number to the variable you wish to hold the percent to increase gained exp by
end
#===============================================================================
#===============================================================================
#===============================================================================
# EDIT AT OWN RISK
#===============================================================================
# ** Game_Actor
#-------------------------------------------------------------------------------
#  This class handles actors. It is used within the Game_Actors class
# ($game_actors) and is also referenced from the Game_Party class ($game_party).
#===============================================================================
class Game_Actor
  #-----------------------------------------------------------------------------
  # * Change Experience
  #     show : Level up display flag
  #-----------------------------------------------------------------------------
  def change_exp(exp, show)

    if $game_switches[JELLY::BONUS_SWITCH] == true
      percent = $game_variables[JELLY::PERCENT_VARIABLE].to_f/100
      bonus = exp * percent
      @exp[@class_id] = [exp.to_i + bonus.to_i, 0].max
    else # is false
      @exp[@class_id] = [exp, 0].max
    end

    last_level = @level
    last_skills = skills
    level_up while !max_level? && self.exp >= next_level_exp
    level_down while self.exp < current_level_exp
    display_level_up(skills - last_skills) if show && @level > last_level
    refresh
  end
end