Percentage decrease is 12.04%.
$\text{% decrease} = \dfrac{ \color{blue}{ \text{initial value} } - \color{red}{ \text{final value} }}{ \color{blue}{ \text{initial value} } } \times 100$ | $$ \begin{aligned} \color{blue}{ \text{initial value} } &= 368.7 \\[1.5em] \color{red}{ \text{final value} } &= 324.3 \end{aligned} $$ |
$\text{% decrease} = \dfrac{ \color{blue}{ 368.7 } - \color{red}{ 324.3 } }{ \color{blue}{ 368.7 } } \times 100 $ | |
$\text{% decrease} = 0.1204 \times 100 $ | |
$\text{% decrease} = 12.04 \% $ |