Some teachers create different categories of grades to place more or less emphasis on certain assignments, or to help you see how you perform in different types of assignments. For example, many teachers believe that tests should have a significant impact on your grade. If you know how many points you've earned on tests so far, along with how many total points were possible, you can calculate your own average score for tests.

Add the total number of points you earned on your tests. For example, if you got a 90, a 78 and an 85, you would calculate:

Add the total number of points you could have earned on each test. For example, if all three tests were out of 100 points, you would calculate

Divide the result from Step 1 by the result from Step 2 to find your test average. Finishing the example, you would calculate:

Multiply the result from Step 3 by 100 to convert it to a percentage. To conclude the example

your average grade for tests.

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About the Author

Mark Kennan is a writer based in the Kansas City area, specializing in personal finance and business topics. He has been writing since 2009 and has been published by "Quicken," "TurboTax," and "The Motley Fool."