Hi

Your profile suggest that you are an  Engineering aspirant

Top 20 percentile is issued by josaa each year for each board.

Minimum percentage requirement  / top 20 percentile criteria was not there in 2020 and 2021 for NITS, IIITS, IITS, GFTIS in order to give relaxation to  students due to covid so josaa had not released top 20 percentile for the year 2020 and 2021 dear so I can't help you with the same dear.

Anyway,

For UP board, in general top 20 percentile is roughly is around 65 to 70 percent in 12th for general category.

For example,

In 2018, for general category, 338 out of 500 marks i. e 67.6 % marks was top 20 percentile for UP board.

You can check the same at

https://engineering.careers360.com/articles/top-20-percentile-of-class-12-boards-for-nits-iiits-and-cftis

Am assuming you are asking abou this to be eligible for NITS etc.

You need to have 75 % in 12th if belongs to general category or needs to be in top 20 percentile. To so to be on the safe decide if your percentage in class 12th is low then I would suggest you to appear for improvement examination

To help you further,

Jee main eligibility criteria is given below-

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

--------) 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 or needs to be in top 20 percentile of their board examination   . This minimum percentage barrier in 12th was lifted off for the year 2021 i. e jee main 2021, if lifted again for jee main 2022 , then NTA will notify about it.

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