Fractions must share a common denominator in order to be added or subtracted. The common denominator is the least common multiple of all the denominators.
What is \( \frac{7}{4} \) - \( \frac{9}{12} \)?
| 1 | |
| 2 \( \frac{9}{12} \) | |
| 2 \( \frac{7}{12} \) | |
| 1 \( \frac{9}{17} \) |