There's two diffrent Accuracy's. There is your Accuracy score which is just a number and there is your Chance To Hit which is a percentage.
- Accuracy score is based on Agility and Survival.
- This score is then modified by all of your equipment and skills.
- Then this number is compared to the target's Evasion score (how they relate I'm not entirely sure).
- The result from that is your Chance To Hit.
For example:
70 Accuracy from Agility and Survival.
-10% from equipment.
+40% from Weapon Skill.
70 x (100 – 10 + 40)%
= 70 x 130%
= 91 Accuracy
Hope this helps!