Does anyone know if armor to dot stacks?

If I have the experimental gloves give me 22% of armor mitigation applies to DOTs and the decayed skull unique helm that gives me 21% of armor mitigation applies to DOTs, do I end up getting 43%? Or just 22%?

43% of course, test effective health points (EHP) here: https://www.lastepochtools.com/planner/

Yeah, and it seems to be capped at 100%, at least in LE-tools.

Thanks everyone!