Question

http://prntscr.com/b2nacj

Answer 1

Too tired to count small lines on my screen, but it looks like 5/9 - 3/9, which is 2/9. Should be B.

Answer 2

Assuming that the lines on both cups are equal

Answer 3

I don't understand the question. I need to subtract?
And yes they are equal I think.

Answer 4

So yeah, take the amount of "water levels" from cup A and subtract them from cup B.