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.

How to Calculate the Employee Labor Percentage. Small-business owners need to keep track of labor using a method that reflects an overall cost approach.

Businesses calculate the shipping cost as a percentage of inventory to better understand logistics expenditures on shipping relative to products held.