Me plz it would be greatly appreciated.

1)200*0.04=8  7th grade students are expected to move,
if moved 12 than it is more than expected 
2)(12/200)*100%=6% 7th grade students moved (6% more than 4%, so it is more than expected)

40%=2/550=1/230=3/1056=14/25

Do the inverse operation