Hello Aspirant,

At 97.5 percentile in JEE mains you'll get a score of around 147 to 138. However it is to be noted by the student that the result of JEE Main 2020 will be released separately for the January and April sessions. The best of the two scores will be taken for candidates who have attempted both the sessions. The merit list will be prepared on the final scores and ranks announced on the basis of the same.

You can visit the following link for detailed analysis on marks and percentile:

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile

All the best