411 10 | = | 169 5 | ÷ | ( | 100 | − | w | ) |
| 方程两边同时乘以: | ( | 100 | − | w | ) |
411 10 | ( | 100 | − | w | ) | = | 169 5 |
411 10 | × | 100 | − | 411 10 | w | = | 169 5 |
| 4110 | − | 411 10 | w | = | 169 5 |
| - | 411 10 | w | = | 169 5 | − | 4110 |
| - | 411 10 | w | = | - | 20381 5 |
20381 5 | = | 411 10 | w |
411 10 | w | = | 20381 5 |
| w | = | 20381 5 | ÷ | 411 10 |
| = | 20381 5 | × | 10 411 |
| = | 20381 | × | 2 411 |
| w | = | 40762 411 |
| w | = | 99.177616 |