DEAR ASPIRANT,

the calculation of percentile will basically depends on the how hard is the question paper.If the question paper  is very tough then u can even get 90 percentile also.

now coming to your another question about recognition.for suppose though u didnt get an iit or nit or iiit also u have a chance of getting a seat in some of the deemed universities with your jee mains percentile. there are many universities they check your mains score one such university is Sastra university,shivanadar e.t.c.

you can check a predicted percentile through the below link:

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile