Answer:
-6 1/4
Step-by-step explanation:
3 1/2 - 9 3/4
Get a common denominator
3 1/2 * 2/2 - 9 3/4
3 2/4 - 9 3/4
Subtract the smaller number from the larger number and take the sign of the larger
9 3/4 - 3 2/4
6 1/4
The sign is negative for 9 3/4 so
- 6 1/4
