| 4 | ÷ | ( | 1 | − | 66 100 | x | ) | = | 84 | ÷ | 7 |
| Multiply both sides of the equation by: | ( | 1 | − | 66 100 | x | ) |
| 4 | = | 84 | ÷ | 7 | × | ( | 1 | − | 66 100 | x | ) |
| 4 | = | 84 | ÷ | 7 | × | 1 | − | 84 | ÷ | 7 | × | 66 100 | x |
| 4 | = | 12 | − | 198 25 | x |
198 25 | x | = | 12 | − | 4 |
198 25 | x | = | 8 |
| x | = | 8 | ÷ | 198 25 |
| = | 8 | × | 25 198 |
| = | 4 | × | 25 99 |
| x | = | 100 99 |
| x | = | 1.010101 |