(6)÷8=4分之3=15:(20)=0.75=(9):12=(75)%
(6)÷8=4分之3=15:20=0.75=(9):20=(75)%结果全部是0.75,6÷8=0.75 15÷20=0.75 9÷20=0.75!
120 3除以4 75% 1200