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

Percentages aren't always easy to calculate, but one of the best tools in Excel's toolbox is calculating percentages for you. Here's how to do it.

Knowing how to calculate relative and cumulative distribution in Excel can be useful in a variety of circumstances. It can be used in market analysis to sort a sample of people into age groups.