Hi dear,

To appear for JEE Mains exam 75 percentage criteria is not necessary. Candidates without 75 percentage and has minimum required percentage can apply for JEE Mains exam.

To get admission into NITs, IIITs and CFTIs candidates require to have minimum 75 percentage of aggregate marks or be in top 20 percentile in 10+2 or equivalent exam from a recognised Board or College.

For reservation category candidates must have minimum 65 percentage in 10+2 or equivalent exam from a recognised Board or College. Candidates must have minimum 5 subjects in 12 th standard and must have Physics, Chemistry and Mathematics as compulsory subjects.

To get more information about JEE Mains Eligibility Criteria go through below mentioned link.

https://engineering.careers360.com/articles/jee-main-eligibility-criteria/amp

Hope this information was useful to you.

All The Best!!