Question: how to find out the percentage of tax?
Answer: To calculate the sales tax that is included in receipts from items subject to sales tax, divide the receipts by 1 + the sales tax rate. For example, if the sales tax rate is 6%, divide the total amount of receipts by 1.06. $255 divided by 1.06 (6% sales tax) = 240.57 (rounded up 14.43 = tax amount to report.