
Kenneth S. answered 12/15/17
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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
It would be criminal if you were not able to convert 330/406 to a percentage.
What you grade will be depends on the published scale for that particular class.
Often, but not always, 90% or more guarantees A, 80 to 89.4% guarantees B, etc.
Consult your class Syllabus, or even ask the instructor.