It is 282, it is easier if you split the shape up into two rectangle shapes
Midpoint coordinates= ((x1+x2)/2 , (y1+y2)/2)
=((0+-4)/2 , ( 4+-12)/2)
= (-2, -8)
Answer: 24
I could be wrong but I believe it’s 24
360 - .2(360) = 288 is 100% of 360,
288*.9 = 259.2