Answer is (B)
Say in old system: 20 floating point operation and 30 fixed point operations
say floating point takes 2 units and fixed point takes 1 unit
Total time in old system= 20*2 +30 *1= 70 units
In Enhanced system floating point takes = 2* 0.8= 1.6 units
fixed point takes= 1*0.9= 0.9 units
Total time = 20*1.6 +30 *0.9 = 59 units
Speedup= 70/59= 1.1864