Sales tax is a percentage of a retail price. To calculate it, convert the state sales tax percentage to a decimal, then multiply it by the retail price of the product or service.

This article looks at how to use Excel’s auditing tools to audit formulas and ensure the accuracy of data.

How to Calculate Percentage Change Calculating percentage change is one of the most frequently used tasks in Excel. The basic formula is: (New Value / Old Value) – 1.

Master how to calculate sales tax and find out how much you'll really pay. Includes tips, examples and local tax rate info.

Your effective tax rate is a good indicator of how well you’ve been managing your tax situation. It’s smart to calculate your effective tax rate each year to help you make adjustments to your ...