| 4 | ÷ | ( | 1 | − | 66 100 | x | ) | = | 60 | ÷ | 7 |
| Multiply both sides of the equation by: | ( | 1 | − | 66 100 | x | ) |
| 4 | = | 60 | ÷ | 7 | × | ( | 1 | − | 66 100 | x | ) |
| 4 | = | 60 | ÷ | 7 | × | 1 | − | 60 | ÷ | 7 | × | 66 100 | x |
| 4 | = | 60 7 | − | 198 35 | x |
198 35 | x | = | 60 7 | − | 4 |
198 35 | x | = | 32 7 |
| x | = | 32 7 | ÷ | 198 35 |
| = | 32 7 | × | 35 198 |
| = | 16 | × | 5 99 |
| x | = | 80 99 |
| x | = | 0.808081 |