Dear sir here is a general what is tp 20% percentile in boards plzzzzzzzzzzzzz explain?

Top20 percentile means studnets belonging in top 20 percent ranks out of total ranks in particular board.

Which means if 100 studnets appear for bpards you must b ein top 20 ranks for eligibility into IITs, NIT, IIITs.

Top20 percentile marks for ach board shared below.

https://engineering.careers360.com/articles/top-20-percentile-cutoff-of-class-12-boards-for-iit-admission