Added 'percenthealth' placeholder

config.yml

@@ -5,6 +5,7 @@
 # {usestyle} will use the defined chars.
 # {displayname} will use player/mob custom name.
 # {opponentlastdamage} the amount of damage the enemy last received.
+# {percenthealth} displays the percentage of health left.
 # Has support for PlaceholderAPI and MVdWPlaceholderAPI.
 Health Message: '&7&l{name}: {usestyle}'
 

src/com/zeshanaslam/actionhealth/utils/HealthUtil.java

@@ -122,6 +122,7 @@ public class HealthUtil {
         output = output.replace("{name}", name);
         output = output.replace("{health}", String.valueOf((int) health));
         output = output.replace("{maxhealth}", String.valueOf((int) maxHealth));
+        output = output.replace("{percenthealth}", String.valueOf((int) ((health / maxHealth) * 100.0)));
         output = output.replace("{opponentlastdamage}", String.valueOf((int) entity.getLastDamage()));
 
         if (output.contains("{usestyle}")) {