甲数是乙数的4倍,那么乙数是甲数的 ,甲数与乙数的比是 ,甲数与甲、乙两数和的比是 .
× =÷ = %= :0.125=四成.
== ÷9=44÷ .
=0.375= :16= %
0.6== ÷30= %
9÷ =0.75= :24= %= 折.