例如:2.56在小数点右边有2位数字,所以d=2。
f = 10d
例如:
f = 102 = 100
x × f / f = y / f
例如:
2.56 × 100 / 100 = 256 / 100
例如:
gcd(256,100) = 4
例如:
256 / 100 = (256/4) / (100/4) = 64/25
百分之一等于百分之一:
1% = 1/100
因此,要将百分数转换为分数,将百分数除以100%并约简分数。
例如56%等于56/100,最大公约数为4,等于14/25:
56% = 56/100 = 14/25
| 百分数 | 分数 | 
|---|---|
| 1% | 1/100 | 
| 10% | 1/10 | 
| 11.11% | 1/9 | 
| 12.5% | 1/8 | 
| 14.29% | 1/7 | 
| 16.67% | 1/6 | 
| 20% | 1/5 | 
| 22.22% | 2/9 | 
| 25% | 1/4 | 
| 28.57% | 2/7 | 
| 30% | 3/10 | 
| 33.33% | 1/3 | 
| 37.5% | 3/8 | 
| 40% | 2/5 | 
| 42.86% | 3/7 | 
| 44.44% | 4/9 | 
| 50% | 1/2 | 
| 55.56% | 5/9 | 
| 57.14% | 4/7 | 
| 62.5% | 5/8 | 
| 66.67% | 2/3 | 
| 60% | 3/5 | 
| 70% | 7/10 | 
| 71.43% | 5/7 | 
| 75% | 3/4 | 
| 77.78% | 7/9 | 
| 80% | 4/5 | 
| 83.33% | 5/6 | 
| 85.71 | 6/7 | 
| 87.5% | 7/8 | 
| 88.89% | 8/9 | 
| 90% | 9/10 |