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6-8 Accelerated 6 Unit 2 Lesson 25

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•Accelerated 6 Accelerated 7

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IM K-5 Math
IM 6-8 Math
IM 9-12 Math

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Unit 2, Lesson 25

Finding This Percent of That

Accelerated 6

Practice

Problem 1

To find 40% of 75, Priya calculates \(\frac{2}{5} \boldcdot 75\). Does her calculation give the correct value for 40% of 75? Explain or show how you know.
If \(x\) represents a number, does \(\frac{2}{5} \boldcdot x\) always represent 40% of that number? Explain your reasoning.

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Problem 2

Lesson 25 Resources

Student Materials

Han spent 75 minutes practicing the piano over the weekend. For each question, explain or show your reasoning.

Priya practiced the violin for 152% as much time as Han practiced the piano. How long did she practice?
Tyler practiced the clarinet for 64% as much time as Han practiced the piano. How long did he practice?

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Problem 3

Last Sunday 1,575 people visited the amusement park. 56% of the visitors were adults, 16% were teenagers, and 28% were children ages 12 and under.

Find the number of adults, teenagers, and children who visited the park.

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Problem 4

Order from greatest to least:

55% of 180

300% of 26

12% of 700

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Problem 5

ForLesson 24: Solving Percentage Problems

Complete each statement.

20% of 60 is ________.
25% of ________ is 6.
________% of 100 is 14.
50% of 90 is ________.
10% of ________ is 7.
30% of 70 is ________.

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Problem 6

ForLesson 20: Solving Rate Problems

A store sells the same kind of sandwich rolls in different-size packages. A six-pack costs \$5.28 and a four-pack costs \$3.40.

Which package size is a better deal? Explain your reasoning.

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Problem 7

ForLesson 12: Part-Part-Whole Ratios

On a field trip, there are 3 chaperones for every 20 students. There are 92 people on the trip.

How many chaperones are there?
How many students are there?

If you get stuck, consider using a tape diagram.

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