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Percent of Change SOL 8.3(b)

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Presentation on theme: "Percent of Change SOL 8.3(b)"— Presentation transcript:

1 Percent of Change SOL 8.3(b)
A percent of change is a ratio that compares the change in quantity to the original amount.

2 Remember a ratio can be written as a fraction!
Percent of Change Remember a ratio can be written as a fraction! amount of change x 100 = % of original amount change

3 golf course on Monday. On Friday he shot a 95. What is the % of
Problem # 1 Zack Cole shot an 86 on the golf course on Monday. On Friday he shot a 95. What is the % of change? Is the score increasing or decreasing?

4 Because score was going up!
Answer #1 amount of change x 100 original amount = 9 = (100) = 10.5% Increase Because score was going up!

5 Kelly Dyer became a great writer. She had a picnic each
Problem # 2 Kelly Dyer became a great writer. She had a picnic each year to celebrate the date of her first published work. The 1st year 50 people came. The 2nd year 30 people came. What is the percent of change?

6 Because the amount of people decreased from year 1 to year 2!
Answer #2 50-30 = 20 = 0.4(100) 50 50 40% Decrease Because the amount of people decreased from year 1 to year 2!

7 Last six weeks Joseph Lawhorn made an 88 average in class.
Problem # 3 Last six weeks Joseph Lawhorn made an 88 average in class. This six weeks he made a 92. Please figure the percent of change.

8 Because his average is going up!
Answer #3 92-88 = 4 = (100) 4.5% Increase Because his average is going up!

9 famous architect. She made $90,000 in 2004. In 2005 she
Problem # 4 Angela Smyre became a famous architect. She made $90,000 in In 2005 she made $120,000. What is the percent of increase?

10 Answer #4 120, ,000 = 30,000= .33(100) 90, ,000 33.3% Increase

11 Amber Robinson became a foster mother, because she is so good with
Problem # 5 Amber Robinson became a foster mother, because she is so good with children. She took care of 8 children in In 2004 she had only 5. What is the percent of change?

12 Answer #5 8 - 5 = 3 = (100) 37.5% Decrease

13 period. What is the percent
Problem # 6 Jonathan Rogers drew 47 planes in 4th period. He drew 28 in 5th period. What is the percent of change?

14 Answer #6 40.4% Decrease

15 last year. He bought only 35 this year. (He lost all his
Problem # 7 Matt Viers bought 42 CD’s last year. He bought only 35 this year. (He lost all his money in the stock market) What is the percent of change?

16 Answer #7 16.7% Decrease

17 great singer. She was so famous she had 12 body guards at one
Problem # 8 Lisa LaViers became a great singer. She was so famous she had 12 body guards at one concert. At the next concert she had 15 body guards. What is the percent of change?

18 Answer #8 25% Increase

19 Jessica Summey and Emily Lower were famous mud wrestlers. They
Problem # 9 Jessica Summey and Emily Lower were famous mud wrestlers. They made $45,000 in In 2009 they made $60,000. What is the percent of change?

20 Answer #9 33.3% Increase

21 Brittany Berrier became a famous doctor. She took out 15 gall
Problem # 10 Brittany Berrier became a famous doctor. She took out 15 gall bladders on May 15th. She took out 30 on May 18th. What is the % of change?

22 Answer #10 100% Increase


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