[Building Sakai] Sakai tables

[mohan at samudrasoftware.com]

Hi,

 I am working on sakai 2.7.0. In tests & quizzes i have set grading
options pass or fail i.e based on percentage (>80% pass otherwise fail).
According to the userid on which table percentage will be stored?.
    Actually this requirement is for generate certificate for user or
student when he pass the test. But I am getting the "total score" from
tables and i have not found the "percentage" field.

Please give  any suggestion for my request

Thanking you,
~Mohan