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Your Rank as Per Current Percentile is 402256  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 644000

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

As per Your current Performance Your Rank is Above 2 Lakhs therefore If You want to qualify JEE Main the You must secure a Rank under 200000 which is Possible only if You perform better in the next attempt of JEE Main, Therefore Try to score more than 85 percentile assuming at Max 14 Lakhs appear in the next attempt.

The Registration for JEE Main April will  begin By 8th February

Hope this Helps All the Best