Hi Shakshi,

Marks are not released by NTA the qualifying not decided on the basis of percentile.And its not out of 300 its out of 360 in which if you belong from general category you must score more than 90 percentile to be in safe zone and for OBC it's 80 percentile for SC 55 percentile and for ST it's 50 percentile to be on safe side for PWD category its 2 percentile.

NTA have no released cutoffs the above predicted cutoffs are from last year.

for more details you can visit the below given link:-

https://engineering.careers360.com/articles/jee-main-cutoff

Hope this will help,please feel free to ask if you have any further queries.

Thank You.