hello aspirant,

According to https://engineering.careers360.com/jee-main-rank-predictor, 70  percentile would fetch you a percentile around 85.96-89.08 and a rank around 132990-149500

As of now its tough to say where exactly you can fetch seat because the analysis and also cutoffs change every year due to many factors like total students appearing for exam,difficulty level of paper etc.you can have chances for nit agartala,nit nagaland,nit assam and iiits .you need better percentile of 95+  to fetch seat in top nits,iiits.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.