i got 66 marks in jee mains september 4th 2nd shift what will be my percentile ?

87 marks in Jee Main paper 1 means you can expect a percentile around 89.02 to 89.22. This would be your overall percentile.

And according to this percentile your expected rank would be in the range of 99000 to 1,17,000, this would be your rank in Common Rank List.

This your predicted rank and percentile and the actual rank and percentile can vary from the actual rank as there are few factors that determine the actual quantities.

We have Jee main college Predictor tool which will give you an idea of the colleges you may get with your percentile and rank. You can use our Jee Main College Predictor tool to know where you have good chances http://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer