Penn Station is saving money to build a new loading platform. Two years ago, they set aside $$24,000$ for this purpose. Today, that account is worth $$28,399.$ What annual rate of interest is Penn Station earning on this investment? $($pick the best answer$)$

Group of answer choices

annual rate

$10\%$

$10\%$

annual rate

$15\%$

$15\%$

annual rate

$20\%$

$20\%$

annual rate