The percent change is given by:
[tex]Percent_{\text{ }}change=\frac{New_{\text{ }}value-Old_{\text{ }}value}{Old_{\text{ }}value}\times100[/tex]Where:
New value = 36in
Old value = 12 in
Therefore:
[tex]\begin{gathered} Percent_{\text{ }}change=\frac{36-12}{12}\times100 \\ Percent_{\text{ }}change=2\times100 \\ Percent_{\text{ }}change=200 \end{gathered}[/tex]Answer:
200%
