A.15.5 B.12.86 C.19.8 D.25.54
A.117×17%=19.89(萬元) B.(117+11.7)×17%=21.879(萬元) C.117÷(1+17%)×17%=17(萬元) D.(117+11.7)÷(1+17%)×17%=18.7(萬元)
A.1017.09 B.1580 C.1452.99 D.1700