📖百分数化分数训练秘籍 #
🎮玩法说明 #
游戏目标： 熟练掌握常考的百分数对应分数的数值，精准快速得出结果。
操作流程： 屏幕显示题目如 “50%=_”，填写分数（最简形式），通过键盘先输入分母再输入分子。
分数与百分数对应表 #
| 百分数（精确/近似值） |
分数（最简形式） |
| 50% = |
1/2 |
| 33.3% ≈ |
1/3 |
| 66.7% ≈ |
2/3 |
| 25% = |
1/4 |
| 75% = |
3/4 |
| 20% = |
1/5 |
| 40% = |
2/5 |
| 60% = |
3/5 |
| 80% = |
4/5 |
| 16.7% ≈ |
1/6 |
| 83.3% ≈ |
5/6 |
| 12.5% = |
1/8 |
| 37.5% = |
3/8 |
| 62.5% = |
5/8 |
| 87.5% = |
7/8 |
| 11.1% ≈ |
1/9 |
| 22.2% ≈ |
2/9 |
| 10% = |
1/10 |
| 30% = |
3/10 |
| 70% = |
7/10 |
| 90% = |
9/10 |
| 5% = |
1/20 |
| 15% = |
3/20 |
| 35% = |
7/20 |
| 45% = |
9/20 |
| 55% = |
11/20 |
| 65% = |
13/20 |
| 85% = |
17/20 |
| 95% = |
19/20 |
| 14.3% ≈ |
1/7 |
| 28.6% ≈ |
2/7 |
| 42.9% ≈ |
3/7 |
| 57.1% ≈ |
4/7 |
| 71.4% ≈ |
5/7 |
| 85.7% ≈ |
6/7 |
🌟练习意义 #
深化对百分数本质的理解（表示一个数是另一个数的百分之几），快速将百分数转化为最简分数进行约分、通分运算。
避免因百分数形式导致的计算误差，为税率、折扣、浓度等百分数应用题的高效求解提供支撑。
