How do I finish this progression mission

How
do I complete  the Artifact Mission with the description of "Equip an
attack type champion with gauntlets, chestplate, and boots with ATK (%)
as their primary stats". It says I have 1 out of 3 even though I
equipped other attack types with the artifacts . problem

Hello,

Share some screenshots, please.

i

This is how to complete mission 39 

i

This is how to complete mission 39 

You can filter to know it they are available ..

Good luck 

i

i have collected the ATK gauntlets, chestplate and boots  and upgraded each one to level 12,  i put them on a attack champion and i am not getting progress for this,   i did upgrade them on the champion,   please help.  i've spent 800,000 silver trying to complete this mission and i'm upset it wont progress.

i have now  collected the ATK  gauntlets, chestpiece and boots,  with ATK  and placed them on a champion, then upgraded them to level 13,   this is not being counted on the mission    what is going on, and why isn't this working.      the other missions are listed as done,  except for the spider boss on stage 1, i killed that 3 times and that isn't listed as completed either,      so frustrating!!!!!!!

Can you take a screenshot of the gear you're equipping and your mission? Thank you. 

i figured out why it wasn't counted.     one artifact on each champion was just ATK,   not  ATK%    that was my issue and after spending a couple mil silver,   i redid all 6 to level 12,   i  had foolishly sold the previous sets i had made  as i didn't realize the critical difference that the % sign made and had finally figured it out after the fact.     super sad at the cost, but at least that mission is over,   i now pay better attention to if the % sign is attached or not.