| 50 | = | 1 | ( | 1 | + | 12 100 | ) | ÷ | ( | R | − | 12 100 | ) |
| Multiply both sides of the equation by: | ( | R | − | 12 100 | ) |
| 50 | ( | R | − | 12 100 | ) | = | 1 | ( | 1 | + | 12 100 | ) |
| 50 | R | − | 50 | × | 12 100 | = | 1 | ( | 1 | + | 12 100 | ) |
| 50 | R | − | 50 | × | 12 100 | = | 1 | × | 1 | + | 1 | × | 12 100 |
| 50 | R | − | 6 | = | 1 | + | 3 25 |
| 50 | R | − | 6 | = | 28 25 |
| 50 | R | = | 28 25 | + | 6 |
| 50 | R | = | 178 25 |
| R | = | 178 25 | ÷ | 50 |
| = | 178 25 | × | 1 50 |
| = | 89 25 | × | 1 25 |
| R | = | 89 625 |
| R | = | 0.1424 |