CBSE

It is hard to get admission in Mithibai College with such a percentage but still, you can go for a try.

According to your percentage, there is chance to get admission.

You haven't mentioned any college in your question neither tagged it to your question. Kindly specify in which college you would like to get admission.

Yes, you will get admission in GPP.

It may be impossible.
There may be high ranking cut offs.
Even a student scored above 90 % get Admission very difficultly.

Hi,
Kindly predict your college in this college predictor. JEE Main rank predictor is an online tool which predicts the candidates rank range and probable colleges based on the difficulty level of the examination, average marks scored in JEE Main and seats available in IITs, NITs, GFTIs, and other SFTIs. The rank predicted might not be accurate but it certainly does give an idea to the aspirant. Know your college admission chances based on your JEE Main Rank, Home State, Caste, Gender, etc. Here https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

Yes, you will get admission in your desired discipline.

Hi,
It is well-known fact that NCERT books are the best and enough for CBSE Class 12 boards preparation. But then again, simply mugging the NCERT books few weeks and days is not going to suffice. You should be thorough with your NCERT books at least 6 months before your boards. This will give you ample time to consider using other reference books. Hope this information was useful.

Your NATA marks is very good. You will surely get this college.

Please use JEE Mains college predictor tool for better results
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor&ved=2ahUKEwi1pZzErb3iAhUQX30KHbopA0QQFjAAegQIBhAB&usg=AOvVaw1N9BzFtyUCP4JU-2UQHQ0H