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.

Instead, you would use the percentage weight when calculating the average. By constructing an Excel spreadsheet, this calculation becomes a simple matter of data entry.

Excel percentage formulas can help with many everyday applications. We'll walk through several examples, including turning fractions to percentages, and calculating percentage of total, increase ...

Learn how to calculate simple, weighted and exponential moving averages in Microsoft Excel using Data Analysis Tool Pack or Formula.

Calculating the return One of the best methods for calculating an average return for a stock investment is the XIRR function in Excel.

How to Calculate the Decline in Sales by Percent for the Number of Years in Excel. When calculating a declining sales figure spanning multiple years, you need to calculate two percentages.

The article How to Calculate an Average Percentage Difference Between Two Dollar Amounts originally appeared on Fool.com. Try any of our Foolish newsletter services free for 30 days .

To calculate the average percentage difference over time, you'll need to build a time series of data. The starting point is the price information for each date on which you're producing an average.