the complete question in the attached figure
we know that
if 1/20=0.05
then 14/20 --------> 14*(1/20)-----> 14*(0.05)-------> 0.7
case a) 0.5+0.05-----> 0.55------> is not 0.7
therefore
This calculation is not a way to find 14/20
case b) 0.75-0.05-----> 0.7-----> is a calculation to find 14/20
case c) 14/20-----> 0.7 -----> is a calculation to find 14/20
case d) 14*0.05----> is a calculation to find 14/20
the answer is
0.5+0.05 is not a way to find 14/20
