If you know this me six grade work i have a lot of homework show your work

So 5/6 divided by 1/8
You were on the right tract by doing Keep Change Flip rule so
5/6 times 8/1
Now multiply across and you get
40/6
You can simplify that into
6 and 4/6
4/6 can further be simplified into 2/3
So your answer is:
6 and 2/3 which is letter C

The answer is 90 % because since 20 multiplied by 5 is 100 you would have to do each question multiplied by 5 so 18 times 5 equals ninety percent.