| 1000 | ( | 1 | + | ( | m | ÷ | 2 | ) | × | 1 100 | ) | × | 500 | ( | 1 | + | m% | ) | = | 660000 |
| 方程左边 = | 500000 | ( | 1 | + | ( | m | ÷ | 2 | ) | × | 1 100 | ) | ( | 1 | + | m% | ) |
| 500000 | ( | 1 | + | ( | m | ÷ | 2 | ) | × | 1 100 | ) | ( | 1 | + | m% | ) | = | 660000 |
| 方程左边 = | 500000 | × | 1 | ( | 1 | + | m% | ) | + | 500000 | ( | m | ÷ | 2 | ) | × | 1 100 | ( | 1 | + | m% | ) |
| = | 500000 | ( | 1 | + | m% | ) | + | 5000 | ( | m | ÷ | 2 | ) | ( | 1 | + | m% | ) |
| = | 500000 | × | 1 | + | 500000 | × | m% | + | 5000 | ( | m | ÷ | 2 | ) | ( | 1 | + | m% | ) |
| = | 500000 | + | 5000 | m | + | 5000 | ( | m | ÷ | 2 | ) | ( | 1 | + | m% | ) |
| = | 500000 | + | 5000 | m | + | 5000 | m | ÷ | 2 | × | ( | 1 | + | m% | ) |
| = | 500000 | + | 5000 | m | + | 2500 | m | ( | 1 | + | m% | ) |
| = | 500000 | + | 5000 | m | + | 2500 | m | × | 1 | + | 2500 | m | × | m% |
| = | 500000 | + | 5000 | m | + | 2500 | m | + | 25 | m | m |
| = | 500000 | + | 7500 | m | + | 25 | m | m |
| 500000 | + | 7500 | m | + | 25 | m | m | = | 660000 |