I decided to make a guide about the critical % bonus, which is a bit confusing people.
Hits:
The % of dealing a critical hit is defined by the % you have on your character. When you reach (or exceed) the 100% critical strike, then your next hit will deal double as much damage as it would usually deal.
Skills:
This is where things get a little bit complicated.
To calculate the % of dealing a critical skill, every time you add an item with critical hit bonus, you calculate the % of your previous build and add it to the sum.
Let's see that with numbers:
Say that I have a basic 50% Critical chance. Trying to add an item with 20% Critical chance will add me:
20% of 50% is: 20% * 50% = 0.2 * 50 % = 10%
Total Critical chance: 50% (basic) + 10% (item) = 60 %.
You will have to do that for each of your items to calculate your total % of critical chance.
*Note: It doesn't really matter the sequence you follow because all of the combinations will lead to an exact amount of %. Also, as you will find out, it is pretty hard to reach 100% critical chance with skills, even though the written amount in your bonus tab is over 100%.
Best Regards, Factory Team