# Algebra 1 Companion Book, Vol 1 – Summer Edition

2.2.4 Applications of Percent – Practice

1.  A salesperson earns a base salary of \$32,500 per year plus a commission of 8% on total sales. Her total sales for one year were \$450,000. Find the salesperson’s total pay for the year.

2.  Find the simple interest paid for 7 years on a \$600 loan at 5% per year.

3.  Find the simple interest paid for 8 years on a \$850 loan at 7.5% per year.

4.  After 5 years the simple interest earned on an investment of \$3,000 was \$645. Find the interest rate.

5.  After 6 months the simple interest earned annually on an investment of \$5000 was \$907. Find the interest rate to the nearest tenth of a percent.

6.  Hidemi is a waiter. He waits on a table of 4 whose bill comes to \$69.98. If Hidemi receives a 20% tip, approximately how much will he receive?

7.  Hidemi is a waiter. He waits on a table of 4 whose bill comes to \$90.27. If Hidemi receives a 15% tip, approximately how much will he receive?

8.  The sales tax rate is 8.2%. Estimate the sales tax on a computer that costs \$550.

9.  The Sanchez family had dinner at their favorite restaurant. A 9% sales tax was added to their bill. Amy paid the bill with a \$10 gift certificate plus \$30.60. How much did the family’s dinner cost before tax? Round your answer to the nearest penny. Hint : Use the equation P + rP = T , where P is the price before tax, r is the sales tax rate, and T is the total price, including tax.

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