Hello Aspirant ,

As per JEE Main Eligibility Criteria 2020 , For NITs, IIITs and CFTIs admissions , the candidates should have obtained a minimum of 75 % aggregate marks or be in the top 20 percentile of their respective boards. For SC/ST category, a minimum of 65% marks required .

JEE Main 2020 B.Arch/B.Planning Admission: Candidates should have passed 10+2 or equivalent exam from a recognized board with a minimum 50% aggregate marks.

NOTE - you can appear for JEE mains exam with that score as well as to appear for the examination there is no such kind of percentage criteria but  you are not Eligible for Admissions to NITs, IIITs and CFTIs.

Hope IT Helps

All The Best !!