1. Your answer 40/3 which is correct!
2. Your answer 1 1/2 which is incorrect, the correct answer is 3.
3. Your answer 8 1/120 which is incorrect, the correct answer is 1/8.
4. Your answer 12/35 which is correct!
5. Your answer 21/10 which is correct!
6. Your answer 6/5 which is correct!
7. Your answer 32/63 which is correct!
8. Your answer 55/13 which is incorrect, the correct answer is 55/78.
9. You have no answer, the correct answer is 45/56
10. You have no answer, the correct answer is 3/5
11. You have no answer, the correct answer is 1
12. You have no answer, the correct answer is 16/25
Hope this helps! Good Luck