Hello student,

National testing agency each year conducts JEE main examination for admission in architecture and engineering courses. Nta each year tales only the percentile. Percentile completely depend upon the number of students. So eventually it is quite difficult for students to you know about that. Like if you have marks between 310 to 360 your percentile can be 100 To 99.987.

To know more click on the link below

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

Hope this helps.