Hi B.Mounica,

I understand that you have by mistake mentioned the wrong percentage of your final year of education  in the application form so to answer your question what you can do is first check to see if there is any correction window available wherein you can edit your data and rectify your mistake and if it is not available then what you should do is to address this matter in writing through post to the respective authorities stating the entire matter in detail along with your proper credentials and data and request them to  rectify your mistake so that you can produce them as and when required in future and also request them to expedite the entire process.

BEST WISHES!