If a stereo is sold for $59.99 and Karen pays $64.19 for it when she checks out, what is the sales tax in the area

Okay, so the first thing you need to do is find the difference.

64.19 - 59.99 = 4.20

So the percentage is determined by dividing that difference by the cost of the item originally:

4.20 / 59.99 = about. 07

Next, you change this number to a percentage by moving the decimal to the right two spaces, so that would be 7%.

Therefore, the sales tax in the area is 7%.