A 12 pack of cinnamon scented pencils sells for 3.00 at a school booster club sale. What is the sales tax rate if the total cost of the pencils is 3.21?
100(0.21/3) = ______%
To find the sales tax rate, we can subtract the original price from the total price, and then divide that difference by the original price.
Let's start by subtracting the original price, $3.00, from the total price, $3.21:
$3.21 - $3.00 = $0.21
Next, let's divide the difference, $0.21, by the original price, $3.00:
$0.21 / $3.00 ≈ 0.07
To express this as a percentage, we multiply the result by 100:
0.07 * 100 = 7
Therefore, the sales tax rate is 7%.