Hello,

There is no minimum percentage requirement to appear in JEE main but to get admission in IITs/NITs/IIITs you need have passed 10+2 or its equivalent with atleast 75% if a candidate belongs to general category and for SC/ST you need to have atleast 65%.

You can get admission in other private colleges through JEE main paper 2.

But to appear in NATA a candidate must have passed diploma with atleast 50% with maths as compulsory subject.You cannot appear if you do not have minimum percentage requirement.