百分数和小数互换外加答案

2/5=40%=0.4
3/5=60%=0.6
4/5= 80%=0.8
3/4 =0.75=75 %
1/4=25%=0.25
1/8=0.125=12.5%
3/8=0.375=37.5%
5/8=0.625=62.5%
7/8=0.875=87.5%
1/10=0.1=10%
3/10=0.3=30%
7/10=0.7=70%
9/10=0.9=90%
11/50=0.22=22%
13/50=0.26=26%
17/50=0.34=34%
19/50=0.38=38%
21/50=0.42=42%
41/100=0.41=41%
13/100=0.13=13%
27/100=0.27=27%