Hello ; Here I am providing you the list of grades ,grade point and percentage of total marks .In general case everyone need 60% ,everywhere to get first class ,but dont go for 60% only.The list is :

Grades          Grade Point         % of total Marks Obtained in the course

O                   10                     90% and above

A+                  9                      85%-90%

A                    8                      80%-85%

B+                  7                      70%-80%

B                     6                       60%-70%

BEST OF LUCK!!!