Hi,

NTA score is defined as a positional rank or percentile score of a candidate who appeared for the JEE Main exam. The score calculation is based on the performance of candidates who have appeared for the exam.

The process goes like this: The raw marks obtained from the session-wise test are normalised. The normalised score is then calculated against the multi-session scores to get an NTA score. The marks obtained are transferred into a 100-to-0 scale for each session. Then, the candidate's position on the scale is calculated by a simple percentile.

Let's say that 100 candidates appeared for the JEE Main exam, including you. On results day, it's revealed that your personal percentile score is 79. It means that 78 candidates scored below you.

Hope this will help you !