You also have to explain how you got your answer. I will give brainliest.

Answer:
7= 2 4/5 8=2/21 9= 6 3/7 10= 1/6 11= 7/5 12=77/90
Step-by-step explanation:
3 1/5= 16/5-2/5=14/5 which equals to the same thing to 2 4/5
5/3= 35/21
11/7= 33/21
35/21-33/21= 2/21
3 3/4=15/4 times 12/7 straight ahead which is 180/28 equals to the same thing as 45/7 = 6 3/7
1/5 times 7/1 so u flip it over as u can see which is 7/5
2 1/5= 11/5 2 4/7= 18/7 11/5 times 7/18=77/90