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

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

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.