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Greetings

Raw scores can Not be calculated from Your Percentile Scores

Your percentile is 82 It 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 attemptIf 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

Hope this Helps All the Best