Hello, hope you are doing well!
You merit score is your NATA scores divided by 2 added with 12th boards percentage and finally dividing the whole number by 2 again i.e. [(104.5/2)+83]/2=67.625. It is an average score.
To predict your college you can use the Career 360's college predictor-
https://engineering.careers360.com/jee-main-architecture-college-predictor?ici=cp-listing_engineering&icn=JEE-Main-Architecture-College-Predictor
Application | Eligibility | Exam Pattern | Admit Card | Answer Key | Result | Cutoff | Accepting Colleges
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile