First of all , that is some really good marks . Congratulations for that . The percentile that you have calculated is based only on the number of students that have appeared the exam on January . The number of students that will be appearing the exam on April will be different.  The final percentile will be calculated based on the total number of students that have appeared the exam . Till now , 9.65 lakhs students have appeared the exam . The percentile is calculated based on that data . All the best !