API GetExpertisePercent

Returns your current expertise reduction to chance to be dodged or parried, in percent. expertisePercent, offhandExpertisePercent = GetExpertisePercent;

Returns

 * expertisePercent : Number - Percentage reduction in dodge and parry chances for swings with your main hand weapon.
 * offhandExpertisePercent : Number - Percentage reduction in dodge and parry chances for swings with your offhand weapon.