Another pitfall cited is expecting to improve the overall performance of a computer by improving only one aspect of the computer. This might be true, but not always. Consider a computer running programs with CPU times shown in the following table.

How much is the total time reduced if the time for FP operations is reduced by 20%?

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a. b. FP Instr. 70 s 40 s INT Instr. 85 s 90 s L/S Instr. 55 S 60 s Branch Instr. 40 S 20 s Total Time 250 s 210 S