Percent Change in Various Scenarios
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Objective:
How to
calculate a
percent
change
CHANGE EXPRESSED AS
A PERCENT
The ratio of the amount of change to the original amount
expressed as a percent.
If a new amount is greater than the original amount, the
percent change is called a Percent increase: the percent
change found when the original amount increases.
If the new amount is less than the original amount, the
percent change is called a Percent decrease: the percent
change found when the original amount decreases.
PERCENT CHANGE
1.
A coat is on sale. The original price of the coat
is $82. The sale price is $74.50. What is the
discount expressed as a percent change?
CALCULATE A PERCENT CHANGE
2.
The average monthly precipitation for Chicago,
Illinois, peaks in June at 4.1 inches. The average
monthly precipitation in December is 2.8 inches.
What is the percent of decrease from June to
December?
CALCULATE A PERCENT CHANGE
3.
A store buys an electric guitar for $295. The
store marks up the price of the guitar to $340. What
is the markup expressed as a percent of change?
CALCULATE A PERCENT CHANGE
4.
In one year, the toll for passenger cars to use a
tunnel rose from $3 to $3.50. What was the percent
increase?
CALCULATE A PERCENT CHANGE
Determine whether each situation involves a percent
increase or a percent decrease.
A)
A hat that originally costs $12 sold for $9.50
B)
You buy a CD for $10 and sell it for $8
C)
A store buys glasses wholesale for $2 per glass. The
store sells them for $4.50
DO YOU UNDERSTAND?
12
questions
PERCENT CHANGE WS
Learn how to calculate percent change expressed as a percentage in different situations like discounts, markups, and price increases or decreases. Understand the concepts with practical examples such as determining the percent change in precipitation levels, prices of items, and more.
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Presentation Transcript
Objective: How to calculate a percent change CHANGE EXPRESSED AS A PERCENT
PERCENT CHANGE The ratio of the amount of change to the original amount expressed as a percent. amount of increase or decrease % original amount = p If a new amount is greater than the original amount, the percent change is called a Percent increase: the percent change found when the original amount increases. amount of increase = new amount - original amount If the new amount is less than the original amount, the percent change is called a Percent decrease: the percent change found when the original amount decreases. amount of decrease = original amount - new amount
CALCULATE A PERCENT CHANGE 1. is $82. The sale price is $74.50. What is the discount expressed as a percent change? A coat is on sale. The original price of the coat
CALCULATE A PERCENT CHANGE 2. Illinois, peaks in June at 4.1 inches. The average monthly precipitation in December is 2.8 inches. What is the percent of decrease from June to December? The average monthly precipitation for Chicago,
CALCULATE A PERCENT CHANGE 3. store marks up the price of the guitar to $340. What is the markup expressed as a percent of change? A store buys an electric guitar for $295. The
CALCULATE A PERCENT CHANGE 4. tunnel rose from $3 to $3.50. What was the percent increase? In one year, the toll for passenger cars to use a
DO YOU UNDERSTAND? Determine whether each situation involves a percent increase or a percent decrease. A) A hat that originally costs $12 sold for $9.50 B) You buy a CD for $10 and sell it for $8 C) A store buys glasses wholesale for $2 per glass. The store sells them for $4.50
12 questions PERCENT CHANGE WS
