Mir, if you have made a mistake in writing the marks or percentage secured in class 10 examinations in application form for any university, then it can create a serious problem in the future irrespective of the fact that this percentage is important or not in the selection criteria of the university. Every institution excepts their students to provide the correct details in their application form and the form remains as the "identity" of the student for quite some time and if you have committed any mistake in filling any details, you should contact the AMU Helpdesk via phone numbers or email id available on the official website or you can contact the varsity or admission convener offline too by writing an official letter elaborating about your mistake and providing the documents containing the correct details. Although the percentage details may or may not be useful in your selection for the applied course but if you are providing wrong details, it may lead to cancellation of your application too, so it is wiser to contact the helpdesk as soon as possible.