Price of item before tax = $4
Price of item after tax = $4.32
Difference = Price of item after tax-Price of item before tax= 4.32 - 4 = 0.32
Difference in price = $0.32
Now we have to find sales tax rate.
Sales tax rate if given by dividing the difference in price by original price and multiplying it by 100.
![Sales tax rate = (Difference)/(Original price)*100](https://img.qammunity.org/2019/formulas/mathematics/middle-school/8zdq1dw1lpxlhv7uz54kydkgkg3fmla9sw.png)
![Sales tax rate = (0.32)/(4)*100](https://img.qammunity.org/2019/formulas/mathematics/middle-school/oycorq2y8r7f70wkx0ou4vx793q5ylydhq.png)
Sales tax rate = 8%
Answer: The sales tax rate of the item is 8%.