Hey Vaishali!

The percentile cutoffs for COEP, Pune is different for different branches of engineering like for CS , the minimum percentile is 98 ,for mechanical , it is 95 etc. But it is the fact that you can only get admission in COEP , pune if your percentile is more than 90. But since , your percentile is much less than  that. You do not have chances for COEP ,pune as getting a seat there is not easy.

To predict your chances in other colleges on the basis of your JEE AIR ,use JEE MAINS college predictor;

https://engineering.careers360.com/jee-main-college-predictor

Hope it helps!