1/20 =0.05 120=0.05 . which calculation is not a way to find 14 20 1420 ?

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