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Question 490007: The yearly changes in the population of a city for three consecutive years are, respectively, 20% increase, 30% increase, and 20% decrease. What is the total percent change from beginning to the end of the third year?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The yearly changes in the population of a city for three consecutive years are, respectively, 20% increase, 30% increase, and 20% decrease. What is the total percent change from beginning to the end of the third year?
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Start: x
End of 1st: 1.2x
End of 2nd: 1.3(1.2x)
End of 3rd: 0.8[1.3(1.2x)] = 1.248x
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Total change is an increase of 24.8%
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Cheers,
Stan H.
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