Divide the tax paid by the price of the item before tax. How to calculate sales tax backward from total. The second script is the reverse of the first.
Step 1 Get the percentage of the original number.
To calculate the sales tax that is included in a companys receipts divide the total amount received for the items that are subject to sales tax by 1 the sales tax rate. Add 1 to Decimal. Add 100 Percent to the Tax Rate. Also check the sales tax rates in different states of the US understand the forms of sales taxes used in different regions of the world or explore hundreds of other calculators addressing topics such as finance math fitness health and many more.