Question

solved

Answer 1

7/27

Answer 2

27-18-2=7 people never showed up. Therefore 7/27 would be your answer.

Answer 3

i had that at first but then i got 16/27

Answer 4

but i guess i had done it wrong cause i took 18/27-2/27=16/27 but i did get the first one the first time were i added 18/27+2/27=20/27 which left 7/27

Answer 5

18+2=20
7/27 never showed

Answer 6

Yes that is a common mistake. Just remember to always think through how the problem needs to be solved. :)