Hello dear student ,

you have scored really good percentile in JEE mains exam and as the procedure to take admission in NIT is you can take admission in NIT top engineering institutes on the basis of the ranks that you will obtain in JEE mains.  As you have obtained 98.9904682 percentile so your rank will be approximately comes around 8700- 8800. which is really good rank so you can expect to get admission in computer science in one of the nits . I hope this is helpful for you dear student

If you want to calculate your rank by your own then dear student you can do it as total percentile score is the percentage  of people ahead of you. 869010 are the number of candidates appeared for Jan exam. So rank formula is (100 - your total score) X 869010 /100.

Best wishes