| ( | X | − | 8 100 | ) | ÷ | 1 100 | = | 42 125 | ÷ | 4717 5000 |
| Left side of the equation = | X | × | 100 | − | 8 100 | × | 100 |
| = | X | × | 100 | − | 8 |
| 100 | X | − | 8 | = | 42 125 | ÷ | 4717 5000 |
| Right side of the equation = | 1680 4717 |
| 100 | X | − | 8 | = | 1680 4717 |
| 100 | X | = | 1680 4717 | + | 8 |
| 100 | X | = | 39416 4717 |
| X | = | 39416 4717 | ÷ | 100 |
| = | 39416 4717 | × | 1 100 |
| = | 9854 4717 | × | 1 25 |
| X | = | 9854 117925 |
| X | = | 0.083562 |