What Does The [**%] Next To Weapon Names Mean?

What does the [%] next to item names mean? For example Mesarock Arch [39%] etc.

 

Assuming you are using Wynntils, that is the average percentage of all of the skills levels. Those percentages are based on whatever values individual stats can be. A high percentage beside the weapon name generally indicates quality, however, one should be sure to look at the individual values.