hello aspirant,

89 percentile would fetch you a rank around 85657-115045.from your profile it shows that you are from west bengal for which nit silchar would be through other state quota.now based on last year cutoffs for round 6 closing ranks for nit silchar for other state is

39263 for civil engineering

30500 for mechanical engineering.these are closing ranks and least cutoffs and for cse the cutoff is around 11k.based on this you have very low chances to fetch seat in nit silchar.you need minimum of 97-98+ to fetch seat there. work better and improve your score for upcoming sessions so that you can fetch a seat in your desired college.for  more information about cutoffs you can refer to: https://engineering.careers360.com/articles/jee-main-cutoff-for-nit-silchar

hope this helps,

thankyou.

good luck!