A program takes $10$ seconds to run on a machine with a $10$ MHz clock rate. The same program takes $3$ seconds to run on a $20$ MHz machine with an identical ISA and a floating point accelerator......... etc

b$)$ How much does the accelerator speed up these instructions if $25\%($instead of $55\%)$ of the time is spent executing floating point instructions on the machine with $10$ MHz clock rate?