The Consumer Price Index (CPI) is a measure of inflation obtained by comparing current prices with base prices in 1982-84. Use this information to complete the missing item in the following table for ice cream.
$$\text{Unknown environment 'tabular'}$$
The percent of increase is \%. (Round to one decimal place as needed.)

Step 1 ：Given the Consumer Price Index (CPI) for ice cream in 2000 is 160.1 and in 2009 is 202.8.

Step 2 ：The percent of increase can be calculated by subtracting the initial value from the final value, dividing the result by the initial value, and then multiplying by 100 to get a percentage.

Step 3 ：Let's denote the initial value as $I$ and the final value as $F$. In this case, $I=160.1$ and $F=202.8$.

Step 4 ：The formula for percent increase is $\frac{F-I}{I}\times 100\mathrm{\%}$.

Step 5 ：Substitute $I$ and $F$ into the formula, we get $\frac{202.8-160.1}{160.1}\times 100\mathrm{\%}$.

Step 6 ：The percent of increase is approximately 26.670830730793266.

Step 7 ：Round to one decimal place as needed, the percent of increase is 26.7.

Step 8 ：Final Answer: The percent of increase is $\boxed{{\displaystyle 26.7\mathrm{\%}}}$.