Question

There is a sales tax of $6 on an item that costs $63 before tax. A second item costs $210 before tax. What is the sales tax on the second item?

Answer 1

The first thing you should do in this case is calculate the tax percentage.
 We then have to apply the following rule of three:
 $ 63 ----> 100%
 6 $ ------> x
 Clearing x we have:
 x = (6/63) * (100)
 x = 9.523809524%
 Therefore the taxes of the second item will be
 Tax = (9.523809524 / 100) * 210
 Tax = 20 $
 Answer:
 The sales tax on the second item is:
 Tax = 20 $