Hello

Greetings

Your percentile is 82It means 82% student of the Total student appeared for the Exam are Behind You Therefore 18% students of the Total students appeared for the exam are Ahead of You, Therefore Your calculated rank is 157404

Your Rank would change Either Your Percentile Score is Increases in the next attempt or Number of Student increases in the Next attempt,If the Number of Student Increases to 1400000 and Your percentile remain same then Your New rank would be 252000

As per Your current Performance You may be eligible for JEE Advance But the final cutoff will be released once the JEE Main April gets Over

If Your Percentile Score Increases in the Next attempt Then Your Rank would Be calculated By the Following Formula

 (100 - your total percentile score (Higher of two)) X Student appeared in JEE Main/100

You can Use the college Predictor to know about the possible colleges in which You may get admission by Just following the link given below

https://engineering.careers360.com/jee-main-college-predictor

Hope this Helps All the Best

hello satyam
As for now it's very difficult to say the rank based on percentile as it will depend on the number of students giving the exam..Still you can use the formula rank =(100-percentile)*874469/100 
This rank is subjected to change based on the april session and hence is not final.You can predict your rank based on this and also some colleges.As for now,we can't predict any branch as it can easily change based on the no. of students giving the mains in april.Therefore,I request to please wait till the april session is over.

Good Luck!