Find Each Number. Round to the Nearest Hundredth If Necessary

Name ______

Practice

Unit 6 – Chapter 6

6.1 – Percent of a Number

Find each number. Round to the nearest hundredth if necessary.

1. 55% of 140 2. 40% of 123 3. 37% of $150

4. 25% of 96 5. 11% of $333 6. 99% of 14

7. 140% of 30 8. 65% of 80 9. 150% of 150

10. SALES Mr. Redding sells vehicles to 20% of the people that come to the sales lot. If 65 people

came to the lot last month, how many vehicles did he sell?

11.COLLEGE A local college recently reported that enrollment increased to 108% percent of

last year. If enrollment last year was at 17,113, about how many students enrolled this year? Round to the nearest whole number.

6.3 - Percent Proportion

Find each number. Round to the nearest tenth if necessary.

1. What percent of 65 is 13?2. $4 is what percent of $50?

3. What number is 35% of 22?4. 14% of 81 is what number?

5. 13 is 26% of what number?6. 55 is 40% of what number?

7.ALLOWANCE Mallorie has $3 in her wallet. If this is 10% of her monthly allowance, what is her monthly allowance?

8. WEDDING Of the 125 guests invited to a wedding, 104 attended the wedding. What percent of

the invited guests attended the wedding?

9. CAMERA The memory card on Melcher's digital camera can hold about 430 pictures. Melcher used 18% of the memory card while taking pictures at a family reunion. About how many pictures did Melcher take at the family reunion? Round to the nearest whole number.

6.4 – Percent as an Equations

Write an equation for each problem. Then solve. Round to the nearest tenth if necessary.

1. What number is 27% of 52? 2. Find 41% of 48.

3. What percent of 88 is 33? 4. 8 is what percent of 18?

5. What number is 33% of 360? 6. What percent of 62 is 58?

7. 19 is 50% of what number? 8. 25 is 32% of what number?

9. ANALYZE GRAPHS Use the graph shown. The total enrollment at Central High School is 798 students.

a. About what percent of the students at Central High are
freshmen? Round to the nearest tenth if necessary.

b. About what percent of the students at Central High are
seniors? Round to the nearest tenth if necessary.

6.5 – Percent Change

For Exercises 1-14, find each percent of change. Round to the nearest whole percent if necessary. State whether the percent of change is an increase or decrease.

1. 8 feet to 10 feet 2. 136 days to 85 days

3. $0.32 to $0.374. 62 trees to 31 trees

5. 51 meters to 68 meters 6. 1.5 to 0.375

7. SURGERY Recent developments in surgical procedures change the average healing time for some operations from 8 weeks to 3 weeks.

8. GEOMETRY Refer to the rectangle shown. Suppose the width of4 inches is decreased by 3

inches.

a. Find the percent of change in the perimeter.

b. Find the percent of change in the area.

6.6 – Sales Tax, Tips, and Markups

Find the total cost to the nearest cent.

1. $18.00 breakfast; 7% tax 2. $14 meal; 20% tip

3. $20 haircut; 10% tip 4. $8.50 shorts; 6.5% markup

5. $75 dinner; 18% tip 6. $74.95 jacket; 5% tax

7. $185 DVD player; 6% markup 8. $85 jeans; 7% tax

9. MEAL Enrique took his family out for dinner. He planned to leave a 15% gratuity on the bill. What is the total cost if the bill was $123.50?

10. TRUCKS What is the sales tax on a $17,500 truck if the tax rate is 6%?

11. COMPUTER Lionel is buying a computer that normally sells for $890. The state sales tax rate is 6%. What is the total cost of the computer including sales tax?

6.7 – Discounts

Find the sale price to the nearest cent.

1. $239 television; 10% discount 2. $72 game; 20% discount

3. $18.95 football; 15% discount 4. $10.99 CD; 25% discount

5. $149 MP3 player; 40% discount 6. $213 ski jacket; 30% discount

7. $595 refrigerator; 20% discount 8. $64 video game; 25% discount

9. RADIO A radio is on sale for $50. If this price represents a 10% discount from the original price, what is the original price to the nearest nickel?

10. LAUNDRY DETERGENT A box of laundry detergent is on sale for $6.50. If this price represents a 40% discount from the original price, what is the original price to the nearest cent?

11. BASKETBALL Find the price of a $35 basketball that is on sale for 60% off the regular price.

6.8 – Simple Interest

Find the simple interest earned to the nearest cent for each principal, interest rate, and time.

1. $750, 7%, 3 years 2. $1,200, 3.5%, 2 years

3. $450, 5%, 4 months4. $668, 5%, 2 years

5. $300, 9%, 3 years 6.$2,000, 20%, 1 year

7. ELECTRONICS Rita charged $126 for a DVD player at an interest rate of 15.9%. How much will Rita have to pay after 2 months if she makes no payments?

8. VACATION The average cost for a vacation is $1,050. If a family borrows money for the vacation at an interest rate of 11.9% for 6 months, what is the total cost of the vacation including the interest on the loan?