Hello Aspirant,

See percentage which is considered for determining the eligibility for JEE-Advance is of overall class 12th result not for best scoring subjects so your overall percentage matters however for this year the percentage criteria has been relaxed and even if you have scored less than 75% then also you will be eligible for admission to NITs and IITs on the basis of JEE-Main and JEE-Advance score respectively.

For more details kindly check out the links given below :-

JEE Advanced Eligibility Criteria 2022 - Check Age Limit, Domicile, Average Marks (careers360.com)

JEE Main Eligibility Criteria 2022 (Released) - Check Age Limit, Qualifying Marks, Number of Attempts (careers360.com)

I hope this information helps you.

Good Luck!!