JEE Mains paper 2 Eligibility

Percentile scores, basically, tells you how you have performed relative to all other candidates who appeared for the exam. It is not the same as your percentage score. While the percentage score tells you the percentage of the total marks or maximum marks for the exam that you have secured, the percentile score indicates what percentage of the total number of candidates appearing for the exam have scored EQUAL TO or LESS THAN the score you secured. This means, in each session, the marks secured by the candidate (say, out of 360 in the case of JEE Main Paper 1) is converted into a scale ranging from 100 to 0. The topper for each session will, thus, secure a percentile score of 100. he Percentile Score for JEE Main will be calculated using the following formula:
Percentile Score of a Candidate = 100 x (Number of candidates who secured a raw score (or actual score) EQUAL TO or LESS than the candidate) / (Total number of candidates who appeared in that session)
You can get more information here in detail - https://www.shiksha.com/engineering/articles/how-to-calculate-jee-main-percentile-score-know-normalization-process-blogId-19933.

AAT (Architecture Aptitude Test) is an entrance exam for admission to IIT-Kharagpur and IIT-Roorkee. Candidates desiring to join the B.Arch programme available at both these IITs must appear in AAT. Only those candidates who have qualified in JEE Advanced are eligible to appear in AAT in 2019. The Joint Implementation Committee of JEE Advanced 2019 will decide the cut-off marks for passing AAT. Candidates securing marks above the cut-off will be declared PASS in the test. There is no separate ranking in the AAT. There is no separate cut-off for students of any category. For more details, check here:
https://www.shiksha.com/college/indian-institute-of-technology-kanpur/aat-exam