Pavan kumar your percentile in jee main is very good but your saying that you have failed in maths 2b so that u cannot eligible for this year.

So, there is a chance if you will pass in supply there is another chance To write jee main exam in the next year.

Not only you have to pass but also you have to aggregate 75% marks in 10+2 board exams.

Hope u will get good percentange and use your second chance to get good NITS AND IITS  so 

All the best!pavan kumar.