IR calculation

What is the information ratio of a portfolio, given the following ordered monthly returns $($in percent$)$ of a portfolio $($p$)$ and the appropriate benchmark $($b$)?$

rp:

$(\mathrm{.}83\mathrm{.}74\mathrm{.}31\mathrm{.}91\mathrm{.}74\mathrm{.}91\mathrm{.}4)$

rb:

$(4\mathrm{.}8\mathrm{.}61\mathrm{.}2\mathrm{.}14\mathrm{.}94\mathrm{.}61\mathrm{.}9)$

Hint: use the definition for IR$.$