| 5 |
| 77 |
| 21 |
| 100 |
| -1117 |
| 7700 |
| 5 |
| 77 |
| 21 |
| 100 |
In order to make fractions have the same denominator, multiply the numerator and denominator of each fraction by the denominator of the other
| 5 x 100 |
| 77 x 100 |
| 21 x 77 |
| 100 x 77 |
| 500 |
| 7700 |
| 1617 |
| 7700 |
| 500 - 1617 |
| 7700 |
| -1117 |
| 7700 |
OR
| (5 x 100) - (21 x 77) |
| 77 x 100 |
| -1117 |
| 7700 |
| -1117 |
| 7700 |
Positive Fractions
| -1 |
| -2 |
| 1 |
| -2 |
| -1 |
| 2 |
| 1 |
| 2 |
Negative Fractions
| -1 |
| 2 |
| 1 |
| -2 |
| -1 |
| -2 |
| 1 |
| 2 |