Casey buys a bracelet. She pays for the bracelet and pays $0.72 in sales tax. The sales tax rate is 6%

With the sales tax set at 6%, and the sales tax on the item is $0.72, the math would dictate that you divide $0.72 by 0.06 (or 6%). You get $12.00. To check your math, multiply $12.00 by 0.06. You should come out with $0.72. Add that to the cost of the bracelet ($12.00) and your total for the bracelet would be $12.72.