Hello surender,

no, getting this percentile is not good enough.becouse even the cutoff for appearing in JEE advance will be 85 percentile or above.

so at this percentile you will not get any Government or any top private college.

you can give again JEE main exam going to be held in April.

form is available on JEE main official site.

thank you so much.

Dear Surendra,

21.05 percentile is not a good marks.

as Experts of well recognised instituions says that the cutoff of JEE main january will be approximate 85 percentile and above.

so I advise you to give upcoming Exam in April. form is avialable.

and if you wan to  get some clue on preparation for JEE main April then you can go through the given link

https://engineering.careers360.com/articles/jee-main-2019-preparation-tips-for-april-exam

hope you understand.

thank you.