MJ2A

Ch 6.5 – Percent Proportion

Bellwork

Write each decimal or fraction and then express it as a percent:

1. 0.51

2. 3.21

3. 15

2500

4. 14

8

Assignment Review

Practice Skills workbook lesson 6.4

Before we begin….

Please take out your notebook and get ready to work…

Continuing with the chapter theme of ratios and proportions…today we will look at the percent proportion…

The percent proportion is used to determine what percent a number is of another number…

Objective 6.5

Students will solve problems using the percent proportion

Parts of the percent proportion In order to effectively use the percent

proportion you must know the parts of the proportion and what they represent…

So…let’s look at an example

Example

22 is what percent of 110?

Percent proportion:In words: part = percent

base 100In numbers 22 = P

110 100After you set up the proportion, cross multiply

and solve algebraically…

Using the percent proportion

The percent proportion can be used to find the base, part, or percent of a number

Examples of what that looks like:

To find the percent you might have a problem like this:

7 is what percent of 10?To find the part you might have a problem like this:

What number is 70% of 10?To find the base you might have a problem like

this:7 is 70% of what number?

Your Turn

In the notes section of your notebook write and solve the following:

1. 70 is what percent of 280?

2. 150 is 60% of what number?

3. What is 72.5% of 200?

Summary

In the notes section of your notebook summarize the key concepts covered in today’s lesson

Today we discussed: The percent proportion How do you set it up? How do you solve it?

Assignment

Text p. 291 #7 – 22

Reminder This assignment is due tomorrow I do not accept late assignments You do not have to write each sentence.

However, you must set up the percent proportion and show how you got your answer.