例如，为了得到十进制分数，通过将分子和分母分别乘以25，3/4被扩展到75/100：
| 3 | = | 3×25 | = | 75 | × 100% = | 75% |
| 4 | 4×25 | 100 |
另一种方法是进行长除法，3除以4。
| 分数 | 百分比 |
|---|---|
| 1/2 | 50% |
| 1/3 | 33.33% |
| 2/3 | 66.67% |
| 1/4 | 25% |
| 2/4 | 50% |
| 3/4 | 75% |
| 1/5 | 20% |
| 2/5 | 40% |
| 3/5 | 60% |
| 4/5 | 80% |
| 1/6 | 16.67% |
| 2/6 | 33.33% |
| 3/6 | 50% |
| 4/6 | 66.67% |
| 5/6 | 83.33% |
| 1/7 | 14.285714% |
| 2/7 | 28.571429% |
| 3/7 | 42.857143% |
| 4/7 | 57.142858% |
| 5/7 | 71.428571% |
| 6/7 | 85.714286% |
| 1/8 | 12.5% |
| 2/8 | 25% |
| 3/8 | 37.5% |
| 4/8 | 50% |
| 5/8 | 62.5% |
| 6/8 | 75% |
| 7/8 | 87.5% |
| 1/9 | 11.111111% |
| 2/9 | 22.222222% |
| 3/9 | 33.333333% |
| 4/9 | 44.444444% |
| 5/9 | 55.555556% |
| 6/9 | 66.666667% |
| 7/9 | 77.777778% |
| 8/9 | 88.888889% |
| 1/10 | 10% |
| 2/10 | 20% |
| 3/10 | 30% |
| 4/10 | 40% |
| 5/10 | 50% |
| 6/10 | 60% |
| 7/10 | 70% |
| 8/10 | 80% |
| 9/10 | 90% |
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