Module 1 lesson 24
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Module 1 Lesson 24 Percent and Rates per 100.notebook 1 November 07, 2014 Oct 88:53 AM Monday No homework Tuesday Election Day Wednesday Problem Set Lesson 24 Thursday Problem Set Lesson 25 Friday Problem Set Lesson 26
Transcript of Module 1 lesson 24
Module 1 Lesson 24 Percent and Rates per 100.notebook
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Monday No homeworkTuesday Election DayWednesday Problem Set Lesson 24Thursday Problem Set Lesson 25Friday Problem Set Lesson 26
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Module 1Ratios and Unit Rates
Topic D: Lesson 24: Percent and Rates per 100
Student Outcomes§ Students understand that percents are related to part‐to‐whole ratios and rates where the whole is 100.
§ Students model percents and write a percent as a fraction over 100 or a decimal to the hundredths place.
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§ Imagine that you are shopping. You want to purchase an item for $100 but today it is 20% off. What does this mean?
§ What does this look like?
How is this related to ratios and rates that we have been working on throughout this unit?
ClassworkExample 1
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Let's explore
§ What does this grid show?
§ How many are shaded in?
§ How many are not shaded in?
§ How can we use this model to help us think through 20% off of $100.
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Robb’s Fruit Farm consists of 100 acres, on which three different types of apples grow. On 25 acres, the farm grows Empire apples. McIntosh apples grow on 30% of the farm. The remainder of the farm grows Fuji apples. Shade in the grid below to represent the portion of the farm each apple type occupies. Use a different color for each type of apple. Create a key to identify which color represents each type of apple.
Color Key Part‐to‐Whole Ratio
Empire _______________ _____________________________
McIntosh _____________ _____________________________
Fuji ______________ _____________________________
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Exercise 2
The shaded portion of the grid represents the portion of a granola bar remaining.
What percent does each square of granola bar represent?
What percent of the granola bar remains?
What other ways can we represent this percent?
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a. What percent is being modeled in each picture? Write your answer as a decimal, fraction, and percent.
Exercise 3
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a. What ratio is being modeled in each picture?
b. How are the ratios and percentages related?
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Exercise 4
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Exercise 5
Mr. Brown shares with the class that 70% of the students got an A on the English vocabulary quiz. If Mr. Brown has 100 students, create a model to show how many of the students passed.
What fraction of the students passed the class?
How could we represent this amount using a decimal?
How are the decimal, the fraction, and the percent all related?
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Exercise 6
Marty owns a lawn mowing service. He has 100 lawns to mow this week and three people to mow them. Use the 10 x 10 grid to model what percentage of the work each employee will complete this weekend.
Color over the name with the same color you used in the diagram.
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Closing
Please take out your exit ticket for Lesson 24, close your binder, and complete the exit ticket. This will be collected.
§ What are three things you learned about in this lesson?
§ Share two ways that you can write 2%.
§ What is one thing that you still want to know about from the lesson?
