We have
[tex]\begin{gathered} 12\text{ }\frac{9}{10}\text{ = 12+}\frac{9}{10}\text{ = }\frac{120}{10}+\frac{9}{10}=\frac{129}{10} \\ 13\text{ }\frac{1}{10}=13+\frac{1}{10}=\frac{130}{10}+\frac{1}{10}=\frac{131}{10} \end{gathered}[/tex]Then, the diference is
[tex]\frac{131}{10}-\frac{129}{10}=\frac{2}{10}=\frac{1}{5}[/tex]So, Jada was 1/5 seconds faster than the second place.
