A、A.50/450×100/100=11.11%
B、200/450×100/100=44.44%
C、450/500×100/100=90%
D、400/550×100/100=81.82%
E、450/650×100/100=53.85%
A、A.50/450×100/100=11.11%
B、200/450×100/100=44.44%
C、450/500×100/100=90%
D、400/550×100/100=81.82%
E、450/650×100/100=53.85%