Hey Harsh!

Looking at your percentile score, I can say your general rank(AIR) must be around 90k-100k.

You can check out NSIT's official cutoff for 2018 here:

https://www.collegepravesh.com/cutoff/nsit-delhi-cutoff-2018/

From the cutoff trends, you can see that there are very less or no chances for you to get into NSIT Delhi.

But as you are from Delhi, you can check out other colleges like Delhi Technological University (DTU). There are more chances for you here.

Hope this helps.

Good luck!