How does piercing works on armor and defense

[AGESISUS]

If my oppenent have five stacks of armor and 50 percent of defense.
How much piercing i need to make damage to him instead of 0 ?

 

[bbp]

About 33%, bc you cut defense with your piercing by %.
eg 5 armor - ~100% defense + 50% in stats = 150%, you need cut little more than 1/3, so it's abt 33% piercing.
With 50% piercing you will cut 75% defense, exactly half.

 

[AGESISUS]

About 33%, bc you cut defense with your piercing by %.
eg 5 armor - ~100% defense + 50% in stats = 150%, you need cut little more than 1/3, so it's abt 33% piercing.
With 50% piercing you will cut 75% defense, exactly half.

Thank you for your answer.
Can Piercing works on MA?
Such as Annie's Blueshifit and BigBand's MA.

 

[bbp]

Can Piercing works on MA? Such as Annie's Blueshifit and BigBand's MA.

Yep. These MAs is just additional defense.
Can say more, you need at least 48% piercing to deal damage to Model Leader if she have - 5 armor, 50% def, and 11 MA (40% def), in total 190% def.

 

[Freedom]

Damn...my highest piercing moveset is 37% and it's for an eliza. I will admit I don't understand the mathematics behind armor, defense and how to combat it with piercing. Certainly makes me curious...