比一比.320×60 32×60026×180 260×1415×400 440×1542×80 160×20.
8:20= ÷ =4: = (填小数)= %
:20==32÷ = %= 成.
8÷ = :4=0.25== %
3:8== ÷24= %.
:20=0.25== %.