Can someone explain tenacity down?

It reduces tenacity to 15%, so regardless of their tenacity before they will have a 15% chance to resist with tenacity down :)

"TheReal_Mol_Eliza1;971859" wrote:
It reduces tenacity to 15%, so regardless of their tenacity before they will have a 15% chance to resist with tenacity down :)

Thanks!

It reduces tenacity by - 999900% however there is still a min 15% chance to resist (not a min tenacity).