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: You can approach your school principal to issue a "To Whomsoever It May Concern" certificate on school letterhead. This document will certify your CGPA and its percentage equivalent using the CBSE formula.
CBSE arrived at this factor by averaging the marks of the previous five years’ results of top schools.
I hereby declare that the above calculation is true and based on the board's official policy. My original marksheet is attached for verification.