Solved Percent Symbol in GUI

[Cold]

Hi i need help with making so it shows a percent symbol without making error.

code:
on right click on entity:
if name of entity is "&f&lFin Fisker":
set metadata tag "FiskGUI" of player to chest inventory with 5 rows named "&f&lFISKE &e&lCHANCER"
set slot 0,1,2,3,4,5,6,7,8,36,37,38,39,41,42,43 and 44 of metadata tag "FiskGUI" of player to white stained glass pane named "&5&l"
set {_value5} to "eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZGRmZDQxM2ZhYjcxMWY0MTcyYTc5MTE2ZGIwN2ExMDJiODBiNjNlOGRkZWUzNTZkMGNjYTMzYmZiODg0YmRiIn19fQ=="
set {_skull5} to skull from skin with value {_value5} signature ""
set data value of {_skull5} to 3
set slot 21 of metadata tag "FiskGUI" of player to {_skull5} named "&5Giant Tooth" with lore "&e50% &aChance"
set slot 23 of metadata tag "FiskGUI" of player to paper named ""
set slot 40 of metadata tag "FiskGUI" of player to paper named ""
open (metadata tag "FiskGUI" of player) to player

on inventory click:
name of player's current inventory = "&f&lFISKE &e&lCHANCER":
cancel event

 

[Practice]

double the % like this:

"&e50%% &aChance"

 

[Cold]

Thanks