Hello Salkhien. Here's how the new percentile procedure of ranking in JEE Main will work:

• JEE Main 2019 exam will be held in different sessions. Each session will have its own NTA percentile score with the highest scorer (s) as 100 percentile.
• A master NTA score will be prepared where all the sessions will be put together for a final ranking.
• The candidate on the top in the final ranking will be the 100 percentile.
• In case of a tie between 100 percentile scorers or any other percentile rank, the merit will be decided on the basis of the highest percentile in Mathematics, Physics and Chemistry in that order.
• If there is a further tie, the person older in age will be ranked higher. The same method will be applied for JEE Main 2019 Paper 2 exam for BArch admissions as well.
• NTA will announce a final merit list after JEE Main Paper 2 exam.
• For aspirants who appear for both the exams (January and April), the better percentile will be counted in the merit list.

Note: To avoid a bunching effect and reduce tied scores, the percentile scores will be calcuated up to seven decimals.Under the new exam format introduced by NTA, the exam will be held over a period of 14 days in each cycle with multiple sessions each day. The idea is to reduce the chances of cheating and malpractices.