把下面的小数化成百分数，百分数化成小数。

小数*100=百分数(不带符号)/%

百分数(不带符号)/100=小数

答案:
0.42 =42%
0.3 =30%
1.2 =1205
70% =0.7
0.6% =0.006
150%=1.5

0.42 =42%
0.3 =30%
1.2 =1205
70% =0.7
0.6% =0.006
150%=1.5

21/50
3/10
6/5
0.7
0.006
1.5

42 =42%
0.3 =30%
1.2 =1205
70% =0.7
0.6% =0.006
150%=1.5

42%
30%
120%
0.7
0.006
1.5

小数化成百分数，百分号前的数字是小数的小数点向右移2位；同样的，百分数化成小数，把百分号前的数字的小数点向左移2位就行啦~

首先你要是到100%=1

0.42*100%=42%
0.3*100%=30%
1.2*100%=120%
70%=0.7*100%=0.7
0.6%=0.006*100%=0.006
150%=1.5*100%=1.5