27 and 90 can both be divided by 9
27 divided by 9 = 3
90 divided by 3= 10
so your answer is 3 over 10
The perimeter of a rectangle is twice the sum of its side lengths.
P=2(L+W), we are told that L=3W and P=176 so
2(3W+W)=176
2(4W)=176
8W=176
W=22 ft, since L=3W
L=66 ft
So the yard is 22 feet wide and 66 feet long.