Chapter 2 Lesson 5 Percent Of Change/Error Review

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| By Nicole Loprimo
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  • 1/5 Questions

    Susie tries to read 50 pages of her book every day.  One week (7 days) she only managed to read 280 pages. What was the percentage error?

    • 17.86%
    • 15%
    • 25%
    • 28%
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About This Quiz

This quiz, titled 'Chapter 2 Lesson 5 Percent of Change\/Error REVIEW', assesses understanding of percentage increases, decreases, and errors through real-life scenarios. It's designed to enhance practical application skills in algebra, focusing on percentage calculations in various contexts.

Chapter 2 Lesson 5 Percent Of Change/Error Review - Quiz

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  • 2. 

    Sabrina's boss states that she will increase Sabrina's salary from $12,000 to $14,000 per year if she enrolls in business courses at a local community college. What percent increase in salary will result from Sabrina taking the business courses?

    • 14% decrease

    • 16.7 decrease

    • 14% increase

    • 16.7% increase

    Correct Answer
    A. 16.7% increase
    Explanation
    By enrolling in business courses at a local community college, Sabrina's salary will increase from $12,000 to $14,000 per year. To find the percent increase, we can calculate the difference between the new salary and the old salary, which is $14,000 - $12,000 = $2,000. Then, we can divide this difference by the old salary and multiply by 100 to get the percentage increase: ($2,000 / $12,000) * 100 = 16.7%. Therefore, Sabrina's salary will increase by 16.7%.

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  • 3. 

    Peter expected to earn $425 in a week. In fact he earned $500. What was the percentage error?SYMBOLS in answers!!

    Correct Answer
    15%
    Explanation
    The percentage error can be calculated by finding the difference between the expected value and the actual value, dividing it by the expected value, and then multiplying by 100. In this case, the difference between the expected earnings of $425 and the actual earnings of $500 is $75. Dividing $75 by $425 gives approximately 0.176, and multiplying by 100 gives approximately 17.6%. However, since the answer choices only have symbols, the closest symbol to 17.6% is 15%.

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  • 4. 

    The cost of a pair of shoes fell from $66 to $54. What was the percentage change?Must state if it is increase or decrease in answer!

    Correct Answer
    18.2% decrease, 18% decrease
    Explanation
    The percentage change can be calculated by finding the difference between the initial and final values, dividing that by the initial value, and then multiplying by 100. In this case, the initial value is $66 and the final value is $54. The difference is $66 - $54 = $12. Dividing $12 by $66 and multiplying by 100 gives us approximately 18.2%. Therefore, the correct answer is 18.2% decrease. However, it is worth noting that rounding to 18% decrease is also acceptable since it is a reasonable approximation.

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  • 5. 

    The 2 AM temperature in the Mojave desert was recorded as 6°F. The 2 PM temperature on the same day was 114°FWhat was the percentage change from 2 AM to 2 PM?

    Correct Answer
    1800%
    1,800%
    Explanation
    The percentage change from 2 AM to 2 PM can be calculated by finding the difference between the two temperatures and dividing it by the initial temperature, then multiplying by 100. In this case, the difference between 114°F and 6°F is 108°F. Dividing 108°F by 6°F gives a result of 18. Multiplying 18 by 100 gives a percentage change of 1800%.

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  • Current Version
  • Mar 14, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 05, 2014
    Quiz Created by
    Nicole Loprimo
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