Percent word problemsSales tax
Work out the total cost after sales tax.
Sales tax adds a percent of the price on top of what you pay. These free printable word-problem worksheets give a price and a tax rate and ask for the total cost — built so every answer lands on a whole dollar.
If they get stuck

The answer key prints on a separate page.
It is a two-part question, and saying it in two parts is what makes it stick: first the tax itself, a percent of the price, and then the total, the price with that tax added on. A child who tries to jump straight to the total often forgets which number the percent is taken of; finding the tax first keeps it in view.
Sales tax is the everyday face of the standard that lists tax, tip and markup by name. It is the same arithmetic as a percent increase, dressed in the situation a child actually meets at a till, which is the whole point of teaching it as a word problem rather than as "increase 40 by 8%".
A $74 game has 50% sales tax.