Question

The sales tax for an item was $21.70 and it cost $310 before tax.
Find the sales tax rate. Write your answer as a percentage.

Answer 1

What percentage of 310 is 21.70?
310 x 0.07 = 21.70
7% sales tax rate

Answer 2

Answer:

$Sales \ Tax \ Amount = Net \ Price \cdot \frac{Sales \ Tax \ percentage}{100}$

$21.70 = 331.70 \cdot \frac{sales\ tax \ percentage}{100} \\\\\frac{21.70}{331.70} = \frac{sales\ tax \ percentage}{100}\\\\0.0654 = \frac{sales\ tax \ percentage}{100}$

Sales Tax Percentage  = 0.0654 × 100 = 6.54%