13. Jamal works at a garage where he earns $8.00 an hour. Recently he received an increase of 4.5% in his hourly wage. How much does he earns now per hour?

14. Mrs. Jenkins works at an appliance store where she receives a 6% commission on her total sales. Monday, she sold $5,250 in appliances. What amount did she make in commission?

15. Jacob earned an annual sallary of $29,750 last year. This year, he makes $ 30,500. What is his rate of increase rounded to the nearest tenth of a percent?

16. A bookstore owner decreased the price on all books stock by 12%. If the original price of a book is $24.95, what is the new price rounded to the nearest cent?