把一张长方形纸对折再对折,每份占这张纸的 .
=0.4==12÷ = %= :25.
= (小数)= (百分数)=12: = 折.
0.75== ÷16=27: = %.
= : =33÷ = %
÷4=25%= : =8÷ = 折.