Answer:
- 13
4
Explanation:
-3 - 1
7 2
= -3 × 2 - 1 × 7
7 × 2 2 × 7
= – 6 – 7
14 14
= –6 – 7
14
= – 13
14
Further explanation
For the problem:
-3 – 1 = ?
7 2
The Least Common Multiple (LCM) of 7 and 2 is 14. Multiply the numerator and denominator of each fraction by whatever value will result in the denominator of each fraction being equal to the LCM:
-3 – 1
7 2
= -3 × 2 – 1 × 7
7 × 2 2 × 7
= –6 – 7
14 14
Now that the fractions have like denominators, subtract the numerators:
-6 – 7
14 14
= -6 – 7
14
= –13
14
The result is:
-3 – 1
7 2
= –13
14