Lesson 3-1 (Percent Proportion Pt 2)

Open Ended

Checking for Understanding

Click on the photo. Which student did the calculations correctly? Explain your reasoning.

Sentence Starter:

Student ___ is right because the _____ represents the variable (x), 45 represents the _____ and 27 represents _____.

Learning Target

I can understand, find, and analyze percent of numbers using proportions.

Vocabulary Words
1. Part
2. Total (Whole)
3. Percent
4. Variable
5. Proportion

Using Percent Proportion to Solve Word Problems

We will learn how to solve word problems by identifying the part, the whole, and the percent.

Two of the 3 (Part, Whole, Percent) would be given in the problem. We will need to solve for the missing value by setting up a proportion.

​LT: I can understand, find, and analyze percent of numbers using proportions

Model Problem

A local little league has a total of 60 players, 80 % of the players are right handed. How many players are right handed?

Part =

Whole =

% =

​LT: I can understand, find, and analyze percent of numbers using proportions

Practice Problem

Sandra's volleyball team has a total of 20 uniforms. 20% of the uniforms are medium in size. How many uniforms are medium?

Let's see what you have learned so far.

​LT: I can understand, find, and analyze percent of numbers using proportions

Multiple Choice

Sandra's volleyball team has a total of 20 uniforms. 20% of the uniforms are medium in size. How many uniforms are medium?

Which value represents the part?

• 20

• 20%

• 100%

• x

Multiple Choice

Sandra's volleyball team has a total of 20 uniforms. 20% of the uniforms are medium in size. How many uniforms are medium?

Which value represents the whole?

• 20

• 20%

• 100%

• x

Multiple Choice

Sandra's volleyball team has a total of 20 uniforms. 20% of the uniforms are medium in size. How many uniforms are medium?

Which value represents the percent?

• 20

• 20%

• 100%

• x

Multiple Choice

Sandra's volleyball team has a total of 20 uniforms. 20% of the uniforms are medium in size. How many uniforms are medium?

Which proportion is set up correctly?

Draw

Solve the Problem.

Sandra's volleyball team has a total of 20 uniforms. 20% of the uniforms are medium in size. How many uniforms are medium?

Multiple Choice

Checking for Understanding #1

Situation: Meg is a veterinarian. In a given week, 50 % of the 16 dogs seen were boxers. Steve also is a veterinarian. In the same week, 7 of the 35 dogs seen were boxers. Each one wants to write down the part, whole and percentage.

A) Does Meg have to solve for the part, whole, or percentage?

• part

• whole

• %

• total

Multiple Choice

Checking for Understanding #2

Situation: Meg is a veterinarian. In a given week, 50 % of the 16 dogs seen were boxers. Steve also is a veterinarian. In the same week, 7 of the 35 dogs seen were boxers. Each one wants to write down the part, whole and percentage.

B) Does Steve have to solve for the part, whole, or percentage?

• part

• whole

• %

• total

Group Work

Each group will have 15-20 minutes to solve a word problem.
Each group will display their work on chart paper.
After the timer, students will present their work.

Materials
-Chart paper
-Pencil
-Markers
-Calculator
-Word Problem

​LT: I can understand, find, and analyze percent of numbers using proportions

Group Work Problem #1

There are 13 boys and 17 girls in Mr. Torres homeroom class. What percent of the class are boys? What percent of the class are girls?

​LT: I can understand, find, and analyze percent of numbers using proportions

Group Work Problem #2

Class 103 & 104 are taking a survey on their favorite genre of movies. What is the percent of students that enjoy watching horror movies?

​LT: I can understand, find, and analyze percent of numbers using proportions

Group Work Problem #3

Yanira answered 85% of the questions correctly in the math exam. Sterlin answered 16 out of 20 questions correctly. Who had the higher test score?

​LT: I can understand, find, and analyze percent of numbers using proportions

Exit Ticket

Go to Google Classroom and Complete Exit Ticket 3-1.

​LT: I can understand, find, and analyze percent of numbers using proportions