Hi Jeetesh, 

Congratulations on your result in JEE Advance. Rank Prediction is done on the basis of total number of aspirants, which this year was 874469. 

The rank prediction formula for this year is (100-Your Percentile) x 874468 x 101. Accordingly, your score will be around 33,404.

For any other queries relating to rank prediction, visit Careers360 page at https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-rank-predictor/amp

Hi

You have got a very good percentile,  you can easily get into NIT. When it comes to rank it is actually difficult to find now because the final rank is based on both the exam.  JEE MAIN AND ADVANCED. 

But approximate rank can be found using this formula

((100 – P)/100)*N + 1

where 

P is your percentile

N is total number of students 8.74 lacks

Put all the number and get your rank