Question

If the sales tax rate is 7.25% in California, then how much tax should a merchant charge in San Francisco for the sale of a $15 scarf?

Answer 1

$15 x .0725 = 1.0875 which we have to round to $1.09
Notice how I changed the  7.25% to a decimal .0725 by moving it back two places.

Answer 2

Sales tax is:
$15* (7.25/100)= $1.09.

The sales tax is $1.09~