Math OER Zoom Room Textbook YouTube Distance Learning Tips

# Math OER Turn In Problems  Mad Science Percentages

The homework you turn in to be graded is the "icing on the cake" that completes a long homework process.

You reviewed your notes. You attempted the example problems in the online notes. You used the problem bank. You did some random problems. Now, finally, you can show off the mastery you have gained from all that work.

Be happy with your written work before you turn it in! Compare your homework with that of classmates. Remember your study skills.

Before using this page, you should have your homework completed on paper. This page is only for submitting your homework. To be short and concise it lacks any diagrams, pictures, or tables needed to work the problems.

Answer every question. Then use the button at the bottom of the page to create a code by processing your answers. Copy-and-paste the code into the body of an e-mail to your instructor.

1. What is 25% of 228?

0.57 5.7 57 5,700

2. What is 40% of 750?

30 300 3,000 30,000

3. The price tag (before sales tax) on an item says \$100. The sales tax rate is 5%. What is the total price (including tax)?

\$5 \$105 \$500 \$2,000

4. During a sale, a dress decreased in price from \$90 to \$72. What was the percent of decrease?

20% 80% 120% 125%

5. An investment increases in value from \$200 to \$216. What is the percent increase?

8% 16% 32% 34.56%

6. A pinball machine that normall sells for \$3,999 is on sale for \$3,150. What is the rate of discount?

\$849 21.2% 98.5% 101.6%

7. Bluebeard has a balance of \$1,834.90 on a credit card with an annual percentage rate of 22.4%. This month's minimum payment is \$36.70. How much less than this minimum payment is the interest? (In other words, if he only pays the minimum payment, how much goes "past" the interest to pay off his principal?)

\$2.45 \$3.74 \$4.40 \$32.59

8. Find the simple interest for a 2 year loan of \$8,000 at a simple interest rate of 12%.

\$192 \$230.40 \$960 \$1,920

9. Find the simple interest for a 2 month loan of \$8,000 at a simple interest rate of 9.42%.

\$62.80 \$125.60 \$753.60 \$1,507.20

10. A store takes out a ninety day loan for \$6,500 at 5.25% simple interest. What is the total amount due after ninety days?

\$84.14 \$341.25 \$6,584.14 \$6,841.25