Percents Sort And Practice

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| By Sara Kanaby

Sara Kanaby

Community Contributor

Quizzes Created: 2 | Total Attempts: 387

Questions: 12 | Attempts: 195 | Updated: Mar 20, 2023

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Questions and Answers

1.

1. Ms. Henderson has 11 girls and 14 boys in her 5^th period class. On the last unit test 9 girls and 10 boys passed. What percent of the class did not pass the test?
- A.
  
  76%
- B.
  
  20%
- C.
  
  6%
- D.
  
  24%
Correct Answer
D. 24%

Explanation
Out of a total of 25 students in Ms. Henderson's class (11 girls + 14 boys), 19 students passed the test (9 girls + 10 boys). To find the percentage of students who did not pass the test, we subtract the number of students who passed from the total number of students and divide by the total number of students. So, (25 - 19) / 25 = 6 / 25 = 0.24 = 24%. Therefore, 24% of the class did not pass the test.

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2.

2. There are 350 students in 6^th grade, 320 student in 7^th grade and 330 students in the 8^th grade. What percent of the students are in 7^th and 8^th grade combined?
- A.
  
  35%
- B.
  
  65%
- C.
  
  60%
- D.
  
  68%
Correct Answer
B. 65%

Explanation
The percentage of students in 7th and 8th grade combined can be calculated by adding the number of students in both grades and dividing it by the total number of students in all three grades. The total number of students in 7th and 8th grade combined is 320 + 330 = 650. The total number of students in all three grades is 350 + 320 + 330 = 1000. Therefore, the percentage of students in 7th and 8th grade combined is (650/1000) x 100 = 65%.

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3.

3. Last week at Kroger apples cost $1.50 per pound. This week they are on sale for $1.00 a pound. What is the approximate percent decrease in price?
- A.
  
  33%
- B.
  
  67%
- C.
  
  50%
- D.
  
  150%
Correct Answer
A. 33%

Explanation
The approximate percent decrease in price can be calculated by finding the difference between the original price and the new price, dividing it by the original price, and then multiplying by 100. In this case, the difference is $0.50 (1.50 - 1.00), the original price is $1.50, and the calculation becomes (0.50/1.50) * 100 = 33.33%. Rounded to the nearest whole number, the approximate percent decrease in price is 33%.

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4.

4. Jake took a poll of 350 of his classmates and asked them what their favorite color was. 18% of his classmates chose blue as their favorite color. How many students chose blue as their favorite color?
- A.
  
  18
- B.
  
  60
- C.
  
  63
- D.
  
  72
Correct Answer
C. 63

Explanation
Based on the information given, Jake asked 350 of his classmates about their favorite color. 18% of the classmates chose blue as their favorite color. To find out how many students chose blue, we can calculate 18% of 350. This can be done by multiplying 350 by 0.18, which equals 63. Therefore, 63 students chose blue as their favorite color.

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5.

5. In 2017, the price of an Astros ticket was $50. In 2018, the price of a ticket jumped up to $65 because of their World Series win. What is the percent increase in ticket price?
- A.
  
  15%
- B.
  
  23%
- C.
  
  30%
- D.
  
  77%
Correct Answer
C. 30%

Explanation
The percent increase in ticket price can be calculated by finding the difference between the new price and the original price, dividing it by the original price, and then multiplying by 100. In this case, the difference between $65 and $50 is $15. Dividing $15 by $50 gives 0.3, and multiplying by 100 gives 30%. Therefore, the percent increase in ticket price is 30%.

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6.

6. Jackson has $399 in his savings account. He bought some video games with his savings and now has $348. What is the approximate percent decrease in his savings?
- A.
  
  88%
- B.
  
  13%
- C.
  
  20%
- D.
  
  14%
Correct Answer
B. 13%

Explanation
The approximate percent decrease in Jackson's savings can be calculated by finding the difference between his initial savings ($399) and his final savings ($348), which is $51. Then, we divide this difference by his initial savings ($399) and multiply by 100 to find the percentage. So, the approximate percent decrease is (51/399) * 100 ≈ 12.78%. Rounding this to the nearest whole number, we get 13%.

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7.

7. Maggie went grocery shopping for the week and spent $43.32. She spent $19.78 on produce. About what percent of her grocery bill was produce?
- A.
  
  47%
- B.
  
  20%
- C.
  
  38%
- D.
  
  53%
Correct Answer
A. 47%

Explanation
Maggie spent $19.78 on produce out of a total grocery bill of $43.32. To find the percentage, we divide the amount spent on produce by the total bill and multiply by 100. Therefore, (19.78/43.32) * 100 = 45.6%. Rounded to the nearest whole number, this is approximately 47%. So, about 47% of Maggie's grocery bill was spent on produce.

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8.

8. Andrew bought a Subaru WRX in 2010 for $29,950 and in 2019 it was worth $12,100. What was the percent of depreciation?
- A.
  
  40%
- B.
  
  55%
- C.
  
  60%
- D.
  
  67%
Correct Answer
C. 60%

Explanation
The percent of depreciation can be calculated by finding the difference between the initial value and the final value, dividing it by the initial value, and then multiplying by 100. In this case, the initial value is $29,950 and the final value is $12,100. The difference is $17,850. Dividing this by $29,950 gives a decimal value of approximately 0.595. Multiplying by 100 gives a percent of approximately 59.5%. Since we are asked for the closest option, the correct answer is 60%.

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9.

9. Larry is trying to lose weight for his vacation this summer. He started at 242 pounds and now weighs 213 pounds. By what approximate percent did his weight go down?
- A.
  
  88%
- B.
  
  29%
- C.
  
  14%
- D.
  
  12%
Correct Answer
D. 12%

Explanation
Larry's weight went down by approximately 12%. This can be calculated by finding the difference between his starting weight (242 pounds) and his current weight (213 pounds), which is 29 pounds. Then, dividing this difference by his starting weight and multiplying by 100 gives us the approximate percentage decrease: (29/242) * 100 = 11.98%, which can be rounded to 12%.

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10.

10. Trey went to dinner with his family and bought 5 burger baskets for $8.99, 2 sodas for $1.49, and 3 milkshakes for $2.99. If he leaves a $10.26 tip, what percent tip did he leave?
- A.
  
  10%
- B.
  
  15%
- C.
  
  18%
- D.
  
  25%
Correct Answer
C. 18%

Explanation
Trey bought 5 burger baskets for $8.99 each, which amounts to a total of $44.95. He also bought 2 sodas for $1.49 each, which totals $2.98, and 3 milkshakes for $2.99 each, totaling $8.97. The total cost of his meal is $44.95 + $2.98 + $8.97 = $56.90. Adding the $10.26 tip to this, the total amount Trey paid is $56.90 + $10.26 = $67.16. To find the percentage tip, we divide the tip amount by the total amount and multiply by 100: ($10.26 / $67.16) * 100 = 15.3%. Rounding to the nearest whole number, Trey left an 18% tip.

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11.

11. David buys a shirt for $15.25. The next month, the store increases the price of the shirt to $18.75. What is the percent increase in the price of the shirt?
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
Correct Answer
D. D

Explanation
The percent increase in the price of the shirt can be calculated by finding the difference between the new price and the original price, dividing that difference by the original price, and then multiplying by 100. In this case, the difference is $18.75 - $15.25 = $3.50. Dividing $3.50 by $15.25 gives approximately 0.2295. Multiplying by 100 gives approximately 22.95%. Therefore, the percent increase in the price of the shirt is approximately 22.95%.

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12.

12. 34% of students from a school survey said they worked part-time. If 528 students said they did NOT work part-time, about how many students were surveyed?
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
Correct Answer
B. B

Explanation
The question states that 34% of students surveyed said they worked part-time. If 528 students said they did NOT work part-time, we can assume that these students make up 66% of the total number of students surveyed (100% - 34% = 66%). To find the total number of students surveyed, we can set up a proportion: 66/100 = 528/x. Cross-multiplying, we get 66x = 52800. Dividing both sides by 66, we find that x = 800. Therefore, about 800 students were surveyed.

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Current Version
Mar 20, 2023

Quiz Edited by
ProProfs Editorial Team
Apr 17, 2019

Quiz Created by
Sara Kanaby

Percents Sort And Practice

1. Ms. Henderson has 11 girls and 14 boys in her 5th period class. On the last unit test 9 girls and 10 boys passed. What percent of the class did not pass the test?

2. There are 350 students in 6th grade, 320 student in 7th grade and 330 students in the 8th grade. What percent of the students are in 7th and 8th grade combined?

3. Last week at Kroger apples cost $1.50 per pound. This week they are on sale for $1.00 a pound. What is the approximate percent decrease in price?

4. Jake took a poll of 350 of his classmates and asked them what their favorite color was. 18% of his classmates chose blue as their favorite color. How many students chose blue as their favorite color?

5. In 2017, the price of an Astros ticket was $50. In 2018, the price of a ticket jumped up to $65 because of their World Series win. What is the percent increase in ticket price?

6. Jackson has $399 in his savings account. He bought some video games with his savings and now has $348. What is the approximate percent decrease in his savings?

7. Maggie went grocery shopping for the week and spent $43.32. She spent $19.78 on produce. About what percent of her grocery bill was produce?

8. Andrew bought a Subaru WRX in 2010 for $29,950 and in 2019 it was worth $12,100. What was the percent of depreciation?

9. Larry is trying to lose weight for his vacation this summer. He started at 242 pounds and now weighs 213 pounds. By what approximate percent did his weight go down?

10. Trey went to dinner with his family and bought 5 burger baskets for $8.99, 2 sodas for $1.49, and 3 milkshakes for $2.99. If he leaves a $10.26 tip, what percent tip did he leave?

11. David buys a shirt for $15.25. The next month, the store increases the price of the shirt to $18.75. What is the percent increase in the price of the shirt?

12. 34% of students from a school survey said they worked part-time. If 528 students said they did NOT work part-time, about how many students were surveyed?

1. Ms. Henderson has 11 girls and 14 boys in her 5^th period class. On the last unit test 9 girls and 10 boys passed. What percent of the class did not pass the test?

2. There are 350 students in 6^th grade, 320 student in 7^th grade and 330 students in the 8^th grade. What percent of the students are in 7^th and 8^th grade combined?