Learn how to calculate Weighted Average in Excel with percentages using the SUM function and the SUMPRODUCT function.

If you track your daily earnings using an Excel spreadsheet, you can use the same spreadsheet to estimate your projected earnings over any time period. Using Excel's "AVERAGE" function, you can ...

What Is a Mean? A mean is the mathematical average of two or more numbers. It can be computed using the arithmetic mean method, which uses the sum of the numbers in the series, and the geometric ...

Save this for the spreadsheet jocks in your office—we'd bet even the experts don't know all of these formula tips.

Investors usually consider the geometric mean a more accurate measure of portfolio performance than the arithmetic mean because it accounts for compounding. Learn more.