This document discusses calculating percentage increases and decreases. It provides examples of using the formulas for percentage increase and decrease. Students are instructed to work through practice problems in groups and individually involving calculating percentages. They are given homework assignments calculating percentages.

1. Percent Increase/Decrease
Section 1.4

2. Note Slide: Percent Increase
)(%)(OldOldNew 

3. Homework Slide
 FRCC has increased the number of
parking spaces by 45%. There used
to be 800 parking spaces, how many
are there now?

4. Note Slide
Percent Increase – A Shortcut
%)%100(  OldNew

5. Homework Slide - Let’s redo
the example using the shortcut:
 FRCC has increased the number of
parking spaces by 45%. There used
to be 800 parking spaces, how many
are there now?

6. Group Work
 Do #5abcd on page 63
 Fill in the table on page 64 for John
and Marissa only and answer the
questions below.
 Who benefits from each option?
 What does the result in the Difference
column mean for John? For Marissa?

7. Let’s Start Homework
 Page 22 #1
 Page 23 #4abc
 Finish the assignment at home. This
will be handed in individually…I just
wanted you to get a chance to work
together on harder problems.

8. Note Slide: Percent Decrease
)(%)(OldOldNew 

9. Video Slide
Watch the following video and write the
example in your notes.
http://www.youtube.com/watch?v=WR8crYu0HiU

10. Homework Slide
 Do problems from page 29 #1, 4abc
in class, then finish the assignment at
home.
 My Math Lab problems section 1.4