Hello Rahul

Greetings

Your percentile is 72 It means 72% student of the Total student appeared for the Exam are Behind You Therefore 28% students of the Total students appeared for the exam are Ahead of You, Therefore Your calculated Approximate rank is 244851

 But Note that this rank is Not the Final rank Your  Rank will change Because It depends on Performance of You and Others in the JEE Main April, And the final Rank would be calculated Based on comparing Final percentile ( Whichever is Higher in Both the attempts if any) of all the students

Your rank is Not Good and You should Try in the Next attempt of JEE Main which is JEE Main April and Try to perform well, THe actual cutoff will be released once JEE Main April Gets over

Hope this Helps All the Best