Commutative is the Answer
You get a common denomiator so which is 18. So mulitply 8/9 by 2 which is 16/18 and multiply 5/6 by 3 which is 15/18 and add 16/18 and 15/18 together and you get.....35/18 and you divide. 35 divided by 18 is 1 13/18
First, always draw. You learned to draw in kindergarben (Yes I spelled it like that on purpose LOL) for a reason.
1) Draw your rectangle on a piece of paper or paint.
2) Scale factor each side to enlarge which means you're going to multiply.
--- Note if it said 'to reduce' then you would divide.
3) Then find the area by multiplying the two given sides (12 x 6 = 72).
4) Don't forget your unit of measurement - 72ft²
So your answer is D.