Excel's GROUPBY function lets you group and aggregate data based on certain fields in your table of data. It also offers arguments that allow you to sort and filter your data, so you can tailor the ...

If you need to average a list of values in Microsoft Excel that contain duplicates without including the duplicates, don't fret over a complex expression when you can easily remove those duplicates.

How to Calculate the Decline in Sales by Percent for the Number of Years in Excel. When calculating a declining sales figure spanning multiple years, you need to calculate two percentages.

Learn how to calculate simple, weighted and exponential moving averages in Microsoft Excel using Data Analysis Tool Pack or Formula.