| ( | ( | 1 | + | G | ) | ÷ | G | ) | × | 1 20 | = | 9 20 |
| ( | 1 | + | G | ) | ÷ | G | × | 1 20 | = | 9 20 |
| Multiply both sides of the equation by: | G |
| ( | 1 | + | G | ) | × | 1 20 | = | 9 20 | G |
| 1 | × | 1 20 | + | G | × | 1 20 | = | 9 20 | G |
1 20 | + | G | × | 1 20 | = | 9 20 | G |
1 20 | G | − | 9 20 | G | = | - | 1 20 |
| - | 2 5 | G | = | - | 1 20 |
1 20 | = | 2 5 | G |
2 5 | G | = | 1 20 |
| G | = | 1 20 | ÷ | 2 5 |
| = | 1 20 | × | 5 2 |
| = | 1 4 | × | 1 2 |
| G | = | 1 8 |
| G | = | 0.125 |