MATH 27

PERCENT PROBLEMS

1. A camera was marked with the following sign. Reduced 20%. If you buy this camera you will save $56. What was the origional price of the camera, and what is the new price? $280; $224

2. Joe student earns 40% commission on the sale of encyclopedias. Last year he earned $4,800. What was his total sales last year? $12,000

3. The 1995 Hondas are 10% more costly than the 1994 models. If a 1995 Honda costs $15,400, what did the 1994 model cost? $14,000

4. Sally bought a new radio for $54. It had been discounted by 10%, and the origional markup over wholesale was 20 %. What was the origional retail price, and the wholesale price? $60; $50

5. Sams Auto Parts has a 20% markup. If sales tax is 10%, how much tax do they pay on a water pump costing them $30? $3.60

6. Jane invested $100 in a bank account with an interest rate of 6% that was compounded bi-annually (twice a year). Jim invested his $100 in a bank account with an interest rate of 6% that was compounded annually (once a year). Who made more money at the end of the year? Jane $106.09; Jim $106

7. John made 8 out of 12 attempted baskets during basketball practice. What percentage did he make? What percentage did he miss? 67%; 33%

8. In post WWII Germany the price of a loaf of bread went from 1 DM to 5.3 DM in one week. What was the percent inflation in the cost of the bread? 530%

9. In the former USSR the rate of inflation over a given period of time was 1000%. If a sack of potatoes cost 230 rubles after the inflationary period, what did it cost before? 23 rubles

10. Sue found that the temperature fluctuated ±5% from the 30 °C temperature her experiment was supposed to be at. What was the range of temperature she experienced? 28.5 °C to 31.5 °C

11. Mark's Boeing bonus was $1,500, and it was 5% of his annual salary. What is his annual salary? $30,000

12. A $20 shirt is on sale for $15. What is the discount (%)? 25%