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Percentile Scores are Calculated as Follow

Total Percentile (T1P): 100 X No. of candidates appeared from the session with raw score EQUAL TO OR LESS than T1 score Total No. of candidates appeared in the session

Mathematics Percentile (M1P):100 X( No. of candidates appeared from the session with raw score EQUAL TO OR LESS than M1 score in Mathematics Total No. of candidates appeared in the session)

Physics Percentile (P1P): 100 X (No. of candidates appeared from the session with raw score EQUAL TO OR LESS than P1score in Physics Total No. of candidates appeared in the session)

Chemistry Percentile (C1P): 100 X( No. of candidates appeared from the session with raw score EQUAL TO OR LESS than C1score in Chemistry Total No. of candidates appeared in the session)

Your Percentile is 43 it means  Your Rank as Per Current Percentile is 498447, 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 remains same then Your New rank would be 798000

Hope this Helps All the best