How to Calculate an Average

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Calculating averages is a simple process that involves adding numbers together and dividing by the amount of numbers that were added together. Find out how to determine that the average of three, four and eight is five with help from a math teacher in this free video series on math help and lessons.

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Hi, I'm Jimmy Chang. I've been teaching college mathematics for nine years now. And we're here to discuss exactly that. Now, calculating an average is actually a fairly simple process, and once you understand what's involved, it's actually a very quick process as well. So, here we go, here's an example. Suppose you have numbers six, one, zero, and two. Now, these are five numbers. You want to keep that in mind. Now, what you want to do to find any average is add all the numbers that you have, and then divide by how many figures that you're beginning with. So, adding these five numbers together, we're going to have three plus six, plus one, plus zero, plus two. Now, three plus six is nine. Nine plus one is ten. Ten plus zero, obviously still ten. And then ten plus two is twelve. So, that's going to be part of the formula for your average. Now what you're going to do after that is divide by how many numbers that you actually have. Now in this case, three, six, one, zero and two obviously make up five numbers. So to find the average of the five figures that you have, just take the twelve that you found earlier, and divide by five. Now, twelve over five is not really a reducible number, but if you calculate that on your calculator, or do it by hand, you'll find out that it's indeed two and two fifths, or you can write it in decimal form as 2.4. But basically you can do that with any set of numbers you want, as long as you know how many figures that you have. All you need to do is add them up and divide by the number of figures. So, I'm Jimmy Chang, and that is how you calculate an average.

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