Hello Nida, 

In order to get admission in Jamia Islamia for Btech civil engineering, you have to score above 92 percentile i. e.  it is safe score for you. 

It is quite easy to score if you follow these steps :

Focus on basic concepts of physics. Solve more sample papers and previous years question papers. Ncert chemistry is just like a bible learnt them. Solve at least 30 questions of Mathematics per day in a given time. Take timed test series. Revision is most important, revise properly. 

Good luck.... 

Hello nida

Well, it's very difficult as of now,to predict the cutoff for colleges of JEE mains and for jee advance based on percentile.You can first calculate your rank by rank=(100-percentile)*874469/100.But to be honest,you won't get IIIT hyderabad with this score,at all.With this rank,you can compare previous year's cutoff for different colleges and can predict some of the colleges you may be getting and also the advance cut off.But remember this is not the final rank.It will change based on the april session of mains.To further predict colleges visit https://engineering.careers360.com/jee-main-college-predictor  .Hope this helps.

Good Luck