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Example 6.26 from Prealgebra, 6.3 Solve Sales Tax, Commission, and Discount Applications
Solve Sales Tax, Commission, and Discount Applications: example 6.26
Evelyn bought a new smartphone for plus tax. She was surprised when she got the receipt and saw that the tax was What was the sales tax rate for this purchase?
Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.
Solution
Identify what you are asked to find. What is the sales tax rate? Choose a variable to represent it. Let sales tax. Write a sentence that gives the information to find it. What percent of the price is the sales tax? Translate into an equation. Divide. Simplify. Check. Is this answer reasonable? Yes, because 8.5% is close to 10%.
10% of $500 is $50, which is close to $42.42.Write a complete sentence that answers the question. The sales tax rate is 8.5%.
Your turn
The book's Try It right after this example: same idea, new numbers. Only the answer is given.
Diego bought a new car for He was surprised that the dealer then added What was the sales tax rate for this purchase?
How did it go?