Chen has been invested in XYZ company for the past $5$ years. His returns are as follows:

Year $1$: $25\%$

Year $2$: $15\%$

Year $3$: $(10\%)$

Year $4$: $30\%$

What is the difference between the arithmetic and the geometric mean of his portfolio?

$3\mathrm{.}48\%$

$2\%$

$1\mathrm{.}12\%$

$2\mathrm{.}45\%$