The disk is a fixed sector with $512$ bytes$/$sector$,$ with $96$ sectors$/$track$,110$ tracks per surface, and $8$ usable surfaces.

Assume the disk rotates at $360$ rpm$.$

A processor reads one sector from the disk using interrupt$-$driven I$/$O$,$ with one interrupt per byte. If it takes $2\mathrm{.}5s$ to process each interrupt, what percentage of the time will the processor spend handling I$/$O$?($disregard seek time$)$