| R | ÷ | ( | R | + | 1 | ) | = | ( | 49 50 | − | 3 5 | ) | ÷ | ( | 49 50 | − | 23 100 | ) |
| 方程两边同时乘以: | ( | R | + | 1 | ) | , | ( | 49 50 | − | 23 100 | ) |
| R | ( | 49 50 | − | 23 100 | ) | = | ( | 49 50 | − | 3 5 | ) | ( | R | + | 1 | ) |
| R | × | 49 50 | − | R | × | 23 100 | = | ( | 49 50 | − | 3 5 | ) | ( | R | + | 1 | ) |
| R | × | 49 50 | − | R | × | 23 100 | = | 49 50 | ( | R | + | 1 | ) | − | 3 5 | ( | R | + | 1 | ) |
3 4 | R | = | 49 50 | ( | R | + | 1 | ) | − | 3 5 | ( | R | + | 1 | ) |
3 4 | R | = | 49 50 | R | + | 49 50 | × | 1 | − | 3 5 | ( | R | + | 1 | ) |
3 4 | R | = | 49 50 | R | + | 49 50 | − | 3 5 | ( | R | + | 1 | ) |
3 4 | R | = | 49 50 | R | + | 49 50 | − | 3 5 | R | − | 3 5 | × | 1 |
3 4 | R | = | 49 50 | R | + | 49 50 | − | 3 5 | R | − | 3 5 |
3 4 | R | = | 19 50 | R | + | 19 50 |
3 4 | R | − | 19 50 | R | = | 19 50 |
37 100 | R | = | 19 50 |
| R | = | 19 50 | ÷ | 37 100 |
| = | 19 50 | × | 100 37 |
| = | 19 | × | 2 37 |
| R | = | 38 37 |
| R | = | 1.027027 |