| 113 | × | 100 | ÷ | X | ÷ | 21 20 | ÷ | 90 | × | 100 | = | 200 |
| Multiply both sides of the equation by: | X |
| 113 | × | 100 | ÷ | 21 20 | ÷ | 90 | × | 100 | = | 200 | X |
| - | 200 | X | = | - | 113 | × | 100 | ÷ | 21 20 | ÷ | 90 | × | 100 |
| - | 200 | X | = | - | 2260000 189 |
2260000 189 | = | 200 | X |
| 200 | X | = | 2260000 189 |
| X | = | 2260000 189 | ÷ | 200 |
| = | 2260000 189 | × | 1 200 |
| = | 11300 189 | × | 1 |
| X | = | 11300 189 |
| X | = | 59.78836 |