| ( | 1 | + | g | ) | ÷ | g | × | 40 100 | = | - | 11 25 |
| 方程两边同时乘以: | g |
| ( | 1 | + | g | ) | × | 40 100 | = | - | 11 25 | g |
| 1 | × | 40 100 | + | g | × | 40 100 | = | - | 11 25 | g |
2 5 | + | g | × | 40 100 | = | - | 11 25 | g |
40 100 | g | + | 11 25 | g | = | - | 2 5 |
21 25 | g | = | - | 2 5 |
| g | = | - | 2 5 | ÷ | 21 25 |
| = | - | 2 5 | × | 25 21 |
| = | - | 2 | × | 5 21 |
| g | = | - | 10 21 |
| g | = | - 0.47619 |