Math Practice 101
Homework Explained - Math Practice 101

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Grade 7 McGraw Hill Glencoe - Answer Keys
Chapter 2: Percents; Lesson 5: Percent of Change


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Independent Practice

Find each percent of change. Round to the nearest whole percent if necessary. State whether the percent of change is an increase or a decrease

  • Question 1 (request help)

    15 yards to 18 yards
  •    \(\large \text{ %}\)
       
  • Question 2 (request help)

    100 acres to 140 acres
  •    \(\large \text{ %}\)
       
  • Question 3 (request help)

    $15.60 to $11.70
  •    \(\large \text{ %}\)
       
  • Question 4 (request help)

    125 centimeters to 87.5 centimeters
  •    \(\large \text{ %}\)
       
  • Question 5 (request help)

    1.6 hours to 0.95 hour
  •    \(\large \text{ %}\)
       
  • Question 6 (request help)

    132 days to 125.4 days
  •    \(\large \text{ %}\)
       

Be Precise Find the percent error.

  • Question 7 (request help)

    Each week, Mr. Jones goes to the grocery store. Mr. Jones estimates that he will spend $120 when he goes to the grocery store this week. He actually spends $94.
  •    \(\large \text{ %}\)
  • Question 8 (request help)

    Marcus estimates that 230 people will attend choir concert. There was an actual total of 300 people who attended the choir concert.
  •    \(\large \text{ %}\)

For each situation, find each percent of change. Round to the nearest whole percent if necessary. State whether the percent of change is an increase or a decrease.

  • Question 9 (request help)

    Three months ago, Santos could walk 2 miles in 40 minutes. Today he can walk 2 miles in 25 minutes.
  •    \(\%\)
  • Question 10 (request help)

    Last school year the enrollment of Genoa Middle School was 465 students. This year  the enrollment is 525.
  •    \(\%\)

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