What type of person are called the persons of highest grade?​

The highest academic standing among their graduating class, and that standing is commonly determined by a numerical formula for Grade Point Average.

But the person with 4.00 person are called the persons of highest grade in our school!

Explanation:

The chosen valedictorian is traditionally the student with the highest academic standing among their graduating class, and that standing is commonly determined by a numerical formula for Grade Point Average (GPA), but other methods of selection are also in use.

The chosen valedictorian is traditionally the student with the highest academic standing among their graduating class,(Grade Point Average,) and that standing is commonly determined by a numerical formula for Grade Point Average.

hope this will help you