As given by the question
There are given that the CPI increase from 209 to 218
Now,
From the formula of inflammation rate:
[tex]\text{Inflammation rate=}\frac{later\text{ CPI-}current\text{ CPI}}{current\text{ CPI}}\times100[/tex]Then,
[tex]\begin{gathered} \text{Inflammation rate=}\frac{later\text{ CPI-}current\text{ CPI}}{current\text{ CPI}}\times100 \\ \text{Inflammation rate=}\frac{218\text{-}209}{209}\times100 \end{gathered}[/tex]Then,
[tex]\begin{gathered} \text{Inflammation rate=}\frac{218\text{-}209}{209}\times100 \\ \text{Inflammation rate=}\frac{9}{209}\times100 \\ \text{Inflammation rate=}4.306 \end{gathered}[/tex]Hence, the inflammation rate is 4.306%.
