Different teachers use different grading methods to determine a student's grade for a class. Some teachers subdivide class assignments into different categories and then weight each category based upon its importance. This weighting values categories that may have more assignments, such as homework, less than categories like tests, that may be fewer in number but, in the opinion of the professor, should still carry more weight in determining a student's grad grade.

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- Calculator

Determine the percentage weight given to each category of grades. For example, a professor might weight tests at 45 percent, projects at 30 percent and homework at 25 percent.

Calculate the grade in each of the categories by dividing the total points attained by the total points possible. For this example, if one had the chance to earn 400 points on tests, but only got 380, you would divide 380 by 400 to find the grade for tests equals 0.95.

Multiply each category grade by the weight given to that category. Continuing the example, since tests count for 45 percent of the grade, multiply 0.45 by 0.95 to get 0.4275.

Add the results from 3 together to find your total grade. Finishing the example, if you got 0.4275 points from tests, 0.33 points from projects and 0.2 points from homework, you would add 0.4275 to 0.33 to 0.2 to find your total grade equals 0.9575, or 95.75 percent.

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