The Ministry of Human Resource Development, Government of India has notified following two changes in the JEE pattern from 2017:
1. There shall be no weightage for the 12th class marks in calculating the ranks in the JEE (Main) examination,
2. For the candidates to qualify for the admission in the IITs/NITs/IIITs and such other CFTIs whose admissions are based on the JEE (Advanced)/JEE(Main) ranks, they should have secured at least 75% marks in the 12th class examination, or be in the top 20 percentile in the 12th class examination conducted by the respective Boards.
For SC/ST students the qualifying marks would be 65% in the 12th class examination.
The complete details can be found here