* The specific course: Different instructors and institutions have different grading policies. Some might set a passing grade as low as 50%, while others might require 60%, 70%, or even higher.
* The level of education: A passing grade in elementary school might be different than a passing grade in college.
* The country/region: Grading scales and passing requirements differ internationally.
To know the passing percentage for *your* grade, you need to check your syllabus, course materials, or ask your instructor.