Answer: Fraction of fence = 2/3 which is approximately 0.67
Explanation: We know that he finishes 1/3 of the fence in 1/2 an hour. To know the fraction he can finish in one hour, we will simply use cross multiplication as follows: 1/3 of the fence ...................> 1/2 an hour ?? of the fence ....................> 1 hour Fraction of the fence = (1/3 * 1) / (1/2) Fraction of fence = 2/3 which is approximately 0.67