Sixty percent of the workload on a certain computer system corresponds to the execution of code not related to I/O. The remaining 40% is due to I/O operations. The total time required to complete the workload is 480 seconds. This total time is to be reduced by 160 seconds by either improving CPU speed or by improving I/O.
a) How much faster would the CPU have to be to achieve this goal? Express your answer as a percent.
b) How much faster would the I/O have to be to achieve this goal? Express your answer as a percent.