Ummm not to freak you out but what’s that in the background?
About 11% - I first subtracted 250 from 282, to get 32. I then did 32/282 to get .11.... You round that out to about 11%
Filling in the boxes:
Top row outside box: 3c and 8
Second row outside box: - or -1
Inside box: -3c and -8
Expanded: -3c - 8
Instructions? "Find the number."
12 + 5n = 9n
12 = 4n and so n = 3 (answer)