Percentage increase is 108233.33%.
$\text{% increase} = \dfrac{ \color{red}{ \text{final value} } - \color{blue}{ \text{initial value} } }{ \color{blue}{ \text{initial value} } } \times 100$ | $$ \begin{aligned} \color{red}{ \text{final value} } &= 260 \\[1.5em] \color{blue}{ \text{initial value} } &= 0.24 \end{aligned} $$ |
$\text{% increase} = \dfrac{ \color{red}{ 260 } - \color{blue}{ 0.24 } }{ \color{blue}{ 0.24 } } \times 100 $ | |
$\text{% increase} = 1082.3333 \times 100 $ | |
$\text{% increase} = 108233.33 \% $ |