First turn 1/2 to 2/4 so you have a common denominator. Next turn the mixed numbers into improper fractions: 11 3/4 --> 47/4 and 8 2/4 --> 34/4 Subtract: 47/4 - 34/4 = 13/4 Divide: 13/4 = 3.25 3.25/2 --> 1.625 or 1 5/8 Therefore, he will have to place it 1 5/8 feet from each side