It is 8,138,64 because the 6 is in the tenths place and compared to 265.47 it is 100 times smaller then it because it is 2 decimal places apart.
to find this you would take each answer and multiple it by 6.45% so A=1.29 , B=1.6125,C=0.645,D=1.161 so the correct answer is B.