What is a c equivalent to in number grade?

There's no single equivalent of a "C" grade in a numerical scale. The numerical range for a C varies significantly depending on the grading system used (e.g., a school, university, or individual professor).

Common ranges might include:

* 70-79%: This is a very frequently used range.

* 67-73%: Some systems might use a narrower range.

* 60-79%: A wider range sometimes used.

To know the precise numerical equivalent of a C in a specific context, you'd need to consult the grading rubric or syllabus for that particular assignment, course, or institution.