You can't score Your Percentile on the basis of Marks because Percentile depends on a lot of other factors too which are equally important. Because Students are less this time and also Paper Variation also affects a lot. So One can't decide easily the percentile on the basis of marks.

So On Basis of Percentile you will be able to check the colleges,

But after getting Percentile, I will recommend you to check All The Colleges, That is available for You on basis of your rankings and Reservation, Then You can also check that at Our JEE MAINS COLLEGE Predictor. That will be very helpful for You.

So Let's Wait for the Result and Hope for the Best You will score well.

ALL THE BEST :)