Hello.
If you want to know your marks on the basis of your percentile so it is quite difficult to provide you the exact marks of your percentile so I am providing you a link below where you can use a chart which can help you to have your approximate marks which you scored.
Link is given below:
https://engineering.careers360.com/articles/jee-main-marks-vs-percentile
for predicting colleges on the basis of your percentile you can use our college predictor tool from the below link:

Best of luck.

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