甲仓有大米2400千克, ,乙仓库有大米多少千克?2400×40% 2400×(1+40%) 2400÷40% 2400÷(1﹣40%) .
÷12=0.75=6: == %
1.25= %== :8= ÷16.
: =3=9÷ .
= :3.6=27÷ == %
5:8== ÷40= %