| ( | 1 | + | x% | ) | ÷ | ( | 1 | + | x% | + | 24 100 | ) | = | 17 | ÷ | 20 |
| 方程两边同时乘以: | ( | 1 | + | x% | + | 24 100 | ) |
| ( | 1 | + | x% | ) | = | 17 | ÷ | 20 | × | ( | 1 | + | x% | + | 24 100 | ) |
| 1 | + | x% | = | 17 | ÷ | 20 | × | ( | 1 | + | x% | + | 24 100 | ) |
| 1 | + | x% | = | 17 | ÷ | 20 | × | 1 | + | 17 | ÷ | 20 | × | x% | + | 17 | ÷ | 20 | × | 24 100 |
| 1 | + | x% | = | 17 20 | + | 17 2000 | x | + | 51 250 |
| 1 | + | x% | = | 527 500 | + | 17 2000 | x |
| x% | − | 17 2000 | x | = | 527 500 | − | 1 |
3 2000 | x | = | 527 500 | − | 1 |
3 2000 | x | = | 27 500 |
| x | = | 27 500 | ÷ | 3 2000 |
| = | 27 500 | × | 2000 3 |
| = | 9 | × | 4 |
| x | = | 36 |