甲数÷乙数=12…9,乙数最小是 ,此时的甲数是 .
÷ = %== 折= 小数.
=20÷ =12÷ =0.8= %
: ==5÷8= %= (填小数)
0.75==6÷ = :32= %
:10==6÷ = (填小数)= %