Answer: To find the sales tax percentage, we can start by subtracting the cost of the item itself from the total cost with tax included.
In this case, the cost of the item is $3, and the total cost with tax included is $3.24, so:
$3.24 - $3 = $0.24
Next, we can divide the amount of sales tax by the cost of the item, and multiply by 100 to find the percentage:
$0.24 ÷ $3 × 100 = 8%
So the sales tax percentage is 8%.
Explanation: