This post explains how to calculate Weighted Average in Excel with percentages. In a standard arithmetic average where the sum of values is divided by the number of values, each data value is treated ...

Excel's PERCENTOF function returns the percentage that a subset of data contributes to a whole dataset, saving you from having to create additional or complex formulas to generate the same outcome.

When you apply Microsoft Excel's percentage number format to a cell already containing a number, it multiplies the value by 100. This can be frustrating, as there's apparently no easy way to stop this ...