Hey,

No specific percentage required to apper in the nda exam. You just need to pass your higher school exams.

Age Limits, Gender & Marital Status:

• For NDA (1) 2018: The candidates possessing age between 2nd July 1999 to 1st July 2002 are eligible for the examination. If born before 2nd July 1999 and after 1st July 2002 then not eligible for NDA (1) 2018 exam.
• For NDA (2) 2018: Those who have age between 2nd January 2000 to 1st January 2003 are permitted to write the exam. If the candidate bears the age before 2nd January 2000 and after 1st January 2003, they are not allowed to appear the exam.
• Only unmarried male candidates are eligible for NDA examination. Girls are not allowed for the NDA entrance examination.

Qualification Criteria:

The minimum qualification required for Indian Army wing, Navy and Air Force is as follows:

Eligibility for Indian Army:

• The candidates want to apply for Indian Army must have completed 12th (10+2 pattern) or its equivalent exam from a well-recognized board.
• The appearing candidates can also apply.

Eligibility for Indian Navy and Air Force:

• Those seeking for Indian Navy and Air Force must have passed their 12th/appearing (10+2 pattern) from a recognized board or University with Physics and Mathematics as a compulsory subject

Hope this helps.