What grade corresponds to at least 90%?

In many grading systems, achieving at least 90% typically corresponds to an 'A' grade. This is commonly understood to represent excellent performance or mastery of the subject matter.

Grading scales often define various letter grades based on percentage ranges, where 'A' generally represents the highest level of achievement. The classification may differ slightly between institutions, but the 90% threshold is a standard benchmark for an 'A' grade in many educational contexts.

This level of mastery indicates that the student has not only understood the material well but also applied it effectively. An 'A' grade is often associated with strong effort, understanding, and application of knowledge, making it the appropriate designation for scores at or above 90%.