Sir I want to become aeronautical engineer how many percentile need and how many percentage are compulsory in 12th
You may know that, The course is a typical engineering based course with specialization in the domain of aerodynamics and aeronautics and is aimed at equipping bachelors students with sufficient knowledge and skills so, as to transform them into qualified and trained aeronautical engineers.
As you want to do aeronautical engineering,So for doing this course,Candidate must have passed the 10+2 or equivalent examination from a recognized state or central board with at least 70% (relaxable for reserved category candidates) of the marks with Physics, Chemistry, and Mathematics as the major subjects of study.

Caste criteria
And can I only take admission through jee
Means if I give collage entrance exam so can I do aeronautics or not
Without JEE mains, you can oy get private colleges, with separate entrance exam.