The sales tax in San Francisco is 8.5%, while in Oakland it is 8.75%. What is the price difference in buying a $21,000 (before tax) car in Oakland and San Francisco?

To find the price difference in sales tax you can subtract the tax rates and then apply it to the total price of the vehicle.

8.75 - 8.5 = 0.25% (change the percent to a decimal)

0.0025 x 21000 = $52.50

There is a price difference of $52.50.