Hello Niraj

It is difficult to predict the actual rank or JEE Advanced qualifying marks as for the first time JEE Main is being conducted twice and rank will be based on NTA percentile score.
You may calculate your expected rank using the Rank Predictor tool-

https://engineering.careers360.com/jee-main-rank-predictor

Marks in the JEE Main exam cannot be calculated from the percentile score.
Good Luck!

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