Name: ______Date: ______

Chapter 7 TEST

8th Grade Pre Algebra

Fill in the chart below with the missing information.

1.

Fraction / Decimal / Percent
123.6%
0.008

2. Write the percent proportion below.

3. Write the percent equation below.

Use a proportion or the percent equation to answer the following questions. Be sure to show all your work and box your final answer.

4.What number is 120% of 74?5.25.2 is 42% of what number?

6.What percent of 600 is 19?7.What number is 0.5% of 8?

8.6 is 4% of what number?9.What percent of 5 is 8?

Use the percent equation to answer the following questions when n = 40.

10.What is (n + 10)% of 80?

A computer randomly generates an integer from 1 to 16. Find the probability of the given event. Write your answer as a percent.

11. P(2)12.P(even number)

13.Write the percent of change formula below.

Find the percent of change and state if it is an increase or a decrease. Show all your work and box your final answer. Round to the nearest 10th if necessary.

14. 65 to 13

Find the new price. Show all your work and box your final answer.

15.Wholesale price : $7516.Original Price: $80

Markup Percent : 150%Discount Percent: 20%

Find the total cost. Show all your work and box your final answer.

17.Originial Price: $9518.Food Bill: $28

Sales Tax: 5%Sales Tax: 6%

Tip: 15%

Write the specified formulas below.

19. a) Simple Interestb) Compound Interest

A = A =

Find the simple interest and the balance of the account.

20.P = $220, r = 2.5%, t = 5 years

Use the appropriate formula to solve the following problems. Show all your work and box your final answer.

21.After 6 months of your original deposit of $2500 being in the bank you now

have $2531.25 due to the simple interest you are collecting. Find the

interest rate. Round to the nearest 10th when necessary.

Use the appropriate formula to solve the following problems. Show all your work and box your final answer.

22. A deposit of $650 is made into an account that earns interest compounded

annually. If the interest rate is 3%, what is the balance after 4 years? Round to the nearest cent.

Solve the following word problems. Show all your work and box your final answer. You final answer should be in sentence form.

23.Mr. DePiano, Mrs. Gilman, and I have a $1360 budget. I have spent 27% of the

budget and Mrs. Gilman has spent 19% of the budget. How much money does

Mr. DePiano have left to spend?

24.Mrs. Timmins is getting ready to purchase a sweater at the Gap. She finds out

that the Gap bought the sweater wholesale for $14.50 and then marked it up

by 165%, but lucky for her it is on a 35% off sale from the retail price. How

much does Mrs. Timmins owe for the sweater after the 6% PA sales tax?

25.The Yankee Candle Company factory made 4 million candles last year. Of

those, 0.9% were defective. How many candles were defective?

Solve the following word problems. Show all your work and box your final answer. You final answer should be in sentence form.

26.You deposit $4280 into a savings account that earns 1.75% interest compounded

annually. What is the balance in your account after 8 years? Round your answer to the nearest cent.

27. In September of 2007 the average gas price was $2.77 per gallon. Presently the

average gas price is $3.46. What is the percent of change?

28.In a survey of 800 people, 32% preferred cats and 27% preferred dogs. How

many more people preferred cats than preferred dogs?

BONUS (+2)

You are making cupcakes for a bake sale. So farm you have made 60 cupcakes. Of those, 24 are vanilla and 36 are chocolate. You want the chocolate cupcakes to make up 70% of the total number of cupcakes. How many more chocolate cupcakes do you have to make?