题目内容
把下面分数化成百分数．
例：
=0.5=50%
=
=
=
=
=
=
=
=
=
=
例：
| 1 |
| 2 |
| 1 |
| 4 |
0.25
0.25
=25%
25%
| 3 |
| 4 |
0.75
0.75
=75%
75%
| 1 |
| 5 |
0.2
0.2
=20%
20%
| 2 |
| 5 |
0.4
0.4
=40%
40%
| 3 |
| 5 |
0.6
0.6
=60%
60%
| 4 |
| 5 |
0.8
0.8
=80%
80%
| 1 |
| 8 |
0.125
0.125
=12.5%
12.5%
| 3 |
| 8 |
0.375
0.375
=37.5%
37.5%
| 5 |
| 8 |
0.625
0.625
=62.5%
62.5%
| 7 |
| 8 |
0.875
0.875
=87.5%
87.5%
．分析：把分数化百分数，先用分数的分子除以分母得出小数商，除不尽时通常保留三位小数，再把小数点向右移动两位，同时填上百分号．
解答：解：
=0.25=25%
=0.75=75%
=0.2=20%
=0.4=40%
=0.6=60%
=0.8=80%
=0.125=12.5%
=0.375=37.5%
=0.625=62.5%
=0.875=87.5%．
故答案为：0.25，25%，0.75，75%，0.2，20%，0.4，40%，0.6，60%，0.8，80%，0.125，12.5%，0.375，37.5%，0.625，62.5%，0.875，87.5%．
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 5 |
| 2 |
| 5 |
| 3 |
| 5 |
| 4 |
| 5 |
| 1 |
| 8 |
| 3 |
| 8 |
| 5 |
| 8 |
| 7 |
| 8 |
故答案为：0.25，25%，0.75，75%，0.2，20%，0.4，40%，0.6，60%，0.8，80%，0.125，12.5%，0.375，37.5%，0.625，62.5%，0.875，87.5%．
点评：此题考查分数化百分数方法的灵活运用，熟记化法是解题关键．
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