| ( | x | − | 883 5 | ) | ÷ | x | × | 100 | = | 28 |
| Multiply both sides of the equation by: | x |
| ( | x | − | 883 5 | ) | × | 100 | = | 28 | x |
| x | × | 100 | − | 883 5 | × | 100 | = | 28 | x |
| x | × | 100 | − | 17660 | = | 28 | x |
| 100 | x | − | 28 | x | = | 17660 |
| 72 | x | = | 17660 |
| x | = | 17660 | ÷ | 72 |
| = | 17660 | × | 1 72 |
| = | 4415 | × | 1 18 |
| x | = | 4415 18 |
| x | = | 245.277778 |