Hi, pushpa.

There will be no requirement to pass with certain percentile for the nchmct jee entrance exam, but the only usage of the percentile is that it will be helpful if you want to choose between which college you will opt for. You can check your eligibility through the rank and marks of the nchmct jee exam.

Please check the link below for the more information about the colleges cutoff 

https://www.google.com/amp/s/hospitality.careers360.com/articles/nchm-jee-cutoff/amp

Goodluck