One application of decimals that arises often is finding the average of a set of numbers. What do you think of when you hear the word average? Is it your grade point average, the average rent for an apartment in your city, the scoring average of a player on your favorite football team? The average is a typical value in a set of numerical data. Calculating an average sometimes involves working with decimal numbers. In this topic, we will look at three different ways to calculate an average.