Hi student,

I think you forgot to mention the date, On which date you gave the JEE Main Examination in March. At 78 marks, in a general you will be able to score somewhere between 88.03 - 91.15 percentile. At this much percentile you may get lower cutoff branches in NIT's, or you may go for state level or private engineering colleges. You should also try for advanced.

Refer here for more info - JEE Main Percentile Predictor 2021- Calculate Percentile Score to Ranks here (careers360.com)

To check your chances in different colleges, you are required to use JEE Main College Predictor Tool:- https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!