Consider the disk drive with the following specification:
$16$ surfaces, $1024$ tracks/surface, $1024$ sectors/track, $1KB/sector$, rotation speed is $3000 rpm$ and the disk is operated in burst Mode. The processor runs at $600 MHZ$ and takes$300$ & $900$ clock cycle to initiate & complete $DMA$ transfer respectively, if the size of transferred data is $20KB$.
The percentage of processor time consumed for the transfer operation is ________.