The Percent Proportion

1
The Percent Proportion

• By Barb Leach
• 7th Grade Mathematics
• Owensville Middle School

2
General Objective

• MA, NO, 2, C, 07
• The student will solve problems using ratio and
  proportion in consumer situations.

3
When will we use this?

• You will use percents to find the sale price of
  an item.
• Printers combine different percents of four basic
  colors to produce colors you see in books and
  magazines.

4
Vocabulary In a percent proportion

• Percentage The number that is compared to
  another number called the base. The part.
• Base The number to which the percentage is
  compared. The total or whole.
• Rate The ratio of a number to 100.
• Percent Proportion P R
• B 100

5
How to use a percent proportion

• 40 is 20 of what number?
• Remember P R or is
• B 100 of 100
• 40 20
• B 100
• 20b 4000
• 20 20
• b 200

6
Practice

• Write and solve a proportion for each.

7
Assessment

• Glencoe Math p. 350 do 1-10
• Alternate/extra practice worksheet

8
References/Resources

• Glencoe Mathematics Applications and Connections
  Course 2
• Scott Foresman-Addison Wesley Middle School Math
  Course 2