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The cpi for "all items" was 233.707 in january 2015, and 236.916 in january 2015. over this period, the rate of inflation as measured by the rate of change of the cpi was

1 Answer

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Assuming the second CPI should be January 2016, not Jan 2015:
To calculate the rate of inflation (rate of change in CPI)
( CPI(2016) - CPI(2015) ) ÷ CPI(2015) x 100%
(236.916 - 233.707) ÷ 236.916 x100% = 1.35%

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User Vlsd
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