1 over 1/2 will simplify into 2. 2/1 simplifies into 2. All we are doing is just dividing by 2 on both the denominator and numerator. So if we want the 1/2 into a whole number, just multiply it by 2 on both sides which then you get 2/1 which simplifies into 2. So the answer is 2. Hope this helps and answers your question!