Hello aspirant,

Nift has relative grading system. Grades are decided upon the performance of the entire class and not on the standard grading system. This is how you may calculate. Consider grades as A, A-, B, B-, C,C-, D, E, and F. So 9 grades. The grades depend on person who scored the highest and lowest and accordingly the grades are set for the entire class

(Consider out of 100) If the highest is 50 and lowest is 45. The person with the highest gets an A and the person with lowest gets the desired grade according to the standard grading system. And the whole class gets the grade divided accordingly into 9 parts. Similarly if the highest in 95 and lowest is 45. The same thing is applied. 

Hope it helps.

Thank you!!