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

Learn how to calculate the Simple Interest in Excel either for a single entry or a range or entries, between two dates, using this forumula.

The article How to calculate conditional subtotals in an Excel revenue sheet uses simple expressions, a function, and a conditional format to display a daily balance in a revenue sheet.

Original Price * (1 – Percentage Decrease). If you need to reverse a discount or calculate the original price from a tax-inclusive amount, divide the adjusted price by: (1 – Percentage Decrease).