Hi,

You should mention the exam for which you are asking to define percentile. Since, it is defined differently for different exams.

For exams like CAT, if topper gets 100 marks and you get 90 marks, you will obtain 90 percentile.

However for exams like JEE main, if 80% students of the total obtained less than you, than you will obtain 80 percentile.

Formula for calculating percentile is always released in the notification.

Thank you.