Percent of Change
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Percent of Change SOL 8.3(b) A percent of change is a ratio that compares the change in quantity to the original amount.
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Percent of Change. SOL 8.3(b). A percent of change is a ratio that compares the change in quantity to the original amount. Percent of Change. Remember a ratio can be written as a fraction! amount of change x 100 = % of original amount change. Problem # 1. - PowerPoint PPT Presentation
Transcript of Percent of Change
Percent of ChangeSOL 8.3(b)
A percent of change is a ratio that compares the change in quantity to the original amount.
Percent of Change
Remember a ratio can be written as a fraction!
amount of change x 100 = % of original amount change
Problem # 1
Zack Cole shot an 86 on thegolf course on Monday. On Fridayhe shot a 95. What is the % ofchange?
Is the score increasing or decreasing?
Answer #1
amount of change x 100 original amount95-86 = 9 = 0.10465(100) = 86 86
10.5% IncreaseBecause score was going up!
Problem # 2Kelly Dyer became a greatwriter. She had a picnic eachyear to celebrate the date of herfirst published work. The 1styear 50 people came. The 2nd
year 30 people came. What isthe percent of change?
Answer #250-30 = 20 = 0.4(100) 50 50
40% DecreaseBecause the amount of people
decreased from year 1 to year 2!
Problem # 3
Last six weeks Joseph Lawhorn made an 88 average in class. This six weeks he made a 92. Please figure the percentof change.
Answer #392-88 = 4 = 0.04545(100) 88 88
4.5% IncreaseBecause his average is going up!
Problem # 4
Angela Smyre became a famous architect. She made $90,000 in 2004. In 2005 shemade $120,000. What is thepercent of increase?
Answer #4
33.3% Increase
120,000- 90,000 = 30,000= .33(100) 90,000 90,000
Problem # 5
Amber Robinson became a fostermother, because she is so good with children. She took care of 8 children in 2003. In 2004 she had only 5. What is the percent of change?
Answer #5
37.5% Decrease
8 - 5 = 3 = 0.375(100) 8 8
Problem # 6
Jonathan Rogers drew 47 planes in4th period. He drew 28 in 5th period. What is the percentof change?
Answer #6
40.4% Decrease
Problem # 7
Matt Viers bought 42 CD’slast year. He bought only35 this year. (He lost all hismoney in the stock market) Whatis the percent of change?
Answer #7
16.7% Decrease
Problem # 8
Lisa LaViers became a great singer. She was so famousshe had 12 body guards at oneconcert. At the next concert shehad 15 body guards. What is the percent of change?
Answer #8
25% Increase
Problem # 9
Jessica Summey and Emily Lowerwere famous mud wrestlers. Theymade $45,000 in 2008. In2009 they made $60,000. What isthe percent of change?
Answer #9
33.3% Increase
Problem # 10
Brittany Berrier became a famousdoctor. She took out 15 gallbladders on May 15th. She took out30 on May 18th. What is the % of change?
Answer #10
100% Increase
