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.

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.

Percentage Formula: Check the concept of percentage with percentage formula for grades 5,6,7,8 of CBSE, ICSE, UP and other boards. Understand how to Calculate Percentage in Excel along with Solved ...