To find the total return on the investment, we calculate the percentage increase from the initial investment to the final amount received. The formula for total return is:
\[
\text{Total Return} = \left( \frac{\text{Final Amount} - \text{Initial Investment}}{\text{Initial Investment}} \right) \times 100
\]
Substituting the given values:
\[
\text{Total Return} = \left( \frac{11400 - 5500}{5500} \right) \times 100 = 107.2727\%
\]
Rounding to one decimal place, the total return is \(107.3\%\).
To find the annual return, we use the formula for compound interest to determine the equivalent yearly growth rate that would result in the total return over the investment period. The formula is:
\[
\text{Annual Return} = \left( \left( \frac{\text{Final Amount}}{\text{Initial Investment}} \right)^{\frac{1}{\text{Years}}} - 1 \right) \times 100
\]
Substituting the given values:
\[
\text{Annual Return} = \left( \left( \frac{11400}{5500} \right)^{\frac{1}{20}} - 1 \right) \times 100 = 3.6986\%
\]
Rounding to one decimal place, the annual return is \(3.7\%\).