The document explains the concept of percent change, using examples to illustrate how to calculate it based on original amount, new amount, amount of change, and percent change. It emphasizes the application of percent change in daily life situations, providing specific cases where these calculations are relevant. Additionally, it mentions that more information on percent change will be shared in upcoming communications.

1. Percent Change Day 1:
Definition of Percent Change
and the three easiest cases

2. Percent change is what we (and the media) use to
describe change.
 If the price of a share of ABC stock starts at $50 and
goes up to $51, the amount of change is $1. The
percent change is 2%.
 If the price of a share of XYZ stock starts at $100 and
goes up to $101, the amount of change is still $1, but
the percent change is 1%.
These are both a percent increase, but it could be
a percent decrease if the price goes down.

3. Introduction
to Percent
Change
In percent change situations, there are four numbers to pay
attention to:
1. Original amount (the “old”/“starting” amount before the
change)
2. New amount (the “ending” amount after the change)
3. Amount of change (the difference [subtract] between
original and new)
4. Percent change (percent increase or decrease).
Put the numbers in the chart to keep things straight.

4. Put the known numbers in the chart,
then figure out the others.

5. Definition of Percent Change is

6. Percent change is used in almost
every aspect of life to describe change
– and our world is changing!

7. The Three Easiest Cases
If you are given two of the first three numbers:
1. Original amount (the amount before the change)
2. New amount (the amount after the change)
3. Amount of change (the difference)
4. Percent change (percent increase or decrease).
You can easily find the third, by adding or subtracting.
Then find the percent change using the definition.

8. Examples:
1. If the DKP membership last year was 200 and this year
it is 188, what is the percent decrease?
Step 1: Amount of change 200 188 12
Amount of change
Step 2: Percent change
Original amount
12
Percent change .06 6% decrease
200

9. Examples:
2. If in March the cost of a gallon of gasoline is
$5.10, which is 30 cents higher than February, what is
the percent increase?
Step 1: Find the original (Feb.) price 5.10 .30 4.80
Amount of change
Step 2: Percent change
Original amount
.30
Percent change .0625 6.25% increase
4.80

10. Examples:
3. If the current number of baseball games shown on
SPNU network is 80 and next year they plan to offer
26 more, what is the percent increase?
You have what you need. Just do it.
Amount of change
Step 1: Percent change
Original amount
26
Percent change .325 32.5% increase
80

11. Closing Notes
 Remember 

12. Stay tuned…
Three more Tweets/Days will
follow, with more information on
percent change.
Learnist board: http://bit.ly/13AGhZq