What does 2.5 equal to as a grade?

2.5 doesn't directly translate to a letter grade because grading scales vary significantly depending on the institution, country, and even the individual instructor. A 2.5 might be a:

* C or C- in some systems: Many US college systems use a GPA where a 2.0 is a C, so 2.5 would likely fall in the C range.

* Fail in other systems: Some systems might have a passing grade of 3.0 or higher.

You need to check your specific school or course's grading rubric to know what a 2.5 represents.