If you mean 7/8 of 36 then it is 31.5
2.1667
78
The LCM of 36 and 78 is 468.
The GCF/HCF of 36 and 78 is 6.
The LCM of 18 36 and 78 is 468.
The GCF of 36, 42, and 78 is 6.
The LCM is 2340.
The Greatest Common Factor of 9, 36, 72: 9
36/78 x 100 = 46.153846 recurring (that is, 46.153846153846....) percent.
28/36 * 100 = 78% =====
The sum is 1407.
If it's a rectangle then: 2*(36+78) = 228 feet