| 100 | ( | 1 | + | 99 2000 | × | 813 | ÷ | 360 | ) | = | 70 | ( | 1 | + | x | × | 813 | ÷ | 360 | ) |
| 方程左边 = | 100 | × | 1 | + | 100 | × | 99 2000 | × | 813 | ÷ | 360 |
| = | 100 | + | 8943 800 |
| = | 88943 800 |
88943 800 | = | 70 | ( | 1 | + | x | × | 813 | ÷ | 360 | ) |
| 方程右边 = | 70 | × | 1 | + | 70 | x | × | 813 | ÷ | 360 |
| = | 70 | + | 1897 12 | x |
88943 800 | = | 70 | + | 1897 12 | x |
| - | 1897 12 | x | = | 70 | − | 88943 800 |
| - | 1897 12 | x | = | - | 32943 800 |
32943 800 | = | 1897 12 | x |
1897 12 | x | = | 32943 800 |
| x | = | 32943 800 | ÷ | 1897 12 |
| = | 32943 800 | × | 12 1897 |
| = | 32943 200 | × | 3 1897 |
| x | = | 98829 379400 |
| x | = | 0.260488 |