Use the following to answer questions:
-(Table: The Consumer Price Index (CPI)) Use Table: The Consumer Price Index (CPI). The consumer price index in 2009 was 212.2. In 2010, it was 216.7. What was the rate of inflation from 2009 to 2010?
A) 12.2%
B) 4.5%
C) 2.1%
D) 16.7%

Question

Use the following to answer questions: 
-(Table: The Consumer Price Index (CPI)) Use Table: The Consumer Price Index (CPI). The consumer price index in 2009 was 212.2. In 2010, it was 216.7. What was the rate of inflation from 2009 to 2010?
A) 12.2% 
B) 4.5% 
C) 2.1% 
D) 16.7%

Quizplus · Accepted Answer

The rate of inflation from 2009 to 2010 is calculated by taking the difference in CPI values for the two years, dividing by the CPI for the starting year (2009), and then multiplying by 100 to get a percentage. Thus, $\frac{216.7 - 212.2}{212.2} \times 100 = 2.1\%$.

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