i got 8.6 matks in xat 2020...what will be my percentile?

With your score you will have a percentile ranging from 40- 50. With this you may not get any good colleges but you can certainly check out colleges accepting other management entrance exams like CAT or CMAT as they would give you a whole lot of colleges to choose from.

You can also check your expected percentile using the  following link

https://bschool.careers360.com/xat-percentile-predictor

Good Luck