1. By: Lucy Primiano Rose O’Neill Brittney Williamson
Percent of Change
By:
Lucy Primiano
Rose O’Neill
Brittney Williamson

2. What is Percent of Change?
Percent of Change is used to show the change in the quantity of an amount. Vocab: Increase- to make bigger, markup, tax, etc. Decrease- to make smaller, discount, on sale, reduce, etc.

3. How to Find Percent of Change
There are two ways to find percent of change, depending on whether you are finding the increase or decrease in amount
Percent of Increase:
New Amount – Original Amount
Original Amount
Percent of Decrease:
Original Amount – New Amount

4. Percent of Increase
Percent of Increase is the percent of the quantity growth, or when the amount of something becomes bigger.
For example: A store sells shirts for $10 each. The store decides to markup the shirts to $15 each.
$15 - $ $10
New Amount
33%
Original Amount
Original Amount

5. EXAMPLES
$321 - $ $ – 24 $876 - $ $823 $267 - $ $92 11

6. Percent of Decrease
Percent of Decrease is the percent of quantity reduction, or when the amount of something becomes smaller.
For example: A store sells shirts for $15 each. The store decides to put the shirts on sale for $10 each.
$15 - $ $15
Original Amount
33%
New Amount
Original Amount

7. EXAMPLES
$543 - $345 $112 - $65 $543 $112 $478 - $ $ –

8. Review
Percent of Change is used to find the percent of increase or decrease of an amount.
Percent of Increase= New Amount - Original Amount / Original Amount
Percent of Decrease= Original Amount - New Amount / Original Amount