hello aspirant,

51 percentile  could fetch you a rank around 501270-563500.now these are based on previous year analysis .As of now its tough to say because the analysis and also cutoffs change every year due to many factors like total students appearing for exam,difficulty level of paper etc.based on your rank you have tough to no chances to fetch seat in government colleges like  nits,iiits.you need a minimum percentile of 96-98+ to fetch seat in good nits,iiits. try to fetch seat in private colleges or universities.or you can try the state btech colleges using jeemain percentile. you need better percentile to fetch seat.workhard for the upcoming jeemain sessions..you can get closing rank for josaa official website: https://josaa.nic.in/Result/Result/currentorcr.aspx

.for more information to get a personalised report on what all chances you have for your rank refer to: https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

hope this helps,

thankyou.