Best Answer: I'm not 100% sure on this either, but it's my understanding that your actual rank doesn't have anything to do with it; the exact/decile/quintile/quartile/none is all about the system your school uses in their class rank.owever, when you select one of the others, it asks for which decile/quartile/quintile you're in rather than your specific rank, so I'm pretty sure you would choose exact. That's the one I'm going with on mine as well (: Hopefully that made sense.