Hi

First of all,  there's no minimum % barrier in 12th to be eligible for jee main.

For your reference,

Jee main eligibility criteria is given below-

--------) Qualification required :- to be eligible  for JEE mains you need 10+2/equivalent qualification.

--------) Passing year :- one is eligible for JEE main examination for consecutive three years starting from the year of appearing for 12th /equivalent examination i. e to be eligible  for   JEE mains 2022   you should be either appearing for 12th board exam or equivalent  in   2022 or should have passed it in 2021 or 2020

--------) There is no age limit to be eligible

-   - ------) there is no minimum percentage requirement to be eligible for JEE Main.

But yes,

To be eligible for NITs, IIITs, CFTIs one needs at least 75% marks in class 12th if belongs to General or OBC category  or at least 65% marks in class 12th if belongs to Sc or St category.

For this year i. e 2021 this minimum percentage requirement of 75% - 65 % has been lifted off   .

††† Important thing to note down is that this 75% barrier was removed for 2021 only , it doesn't mean that in next year, 2021 passed students won't have 75 % barrier just because they had passed in 2021.

In 2022, this 75-65 % criteria for       NITs, IIITs, CFTIs will be there( if removed due to conditions like pandemic then nta will notify about it)    .

So, if you have less than 75% then you can appear for improvement examination so that you become eligible for NITs etc.

For detailed information about jee main eligibility criteria  go through our page, the link for which is provided below

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

Thank you