So, all 4 numbers added together equals ?. So, we have to figure out how much total there is to find the perimeter. So first of all we find common denominators and then we add, your 4 denominators should be Out Of 12. Next, you add them by a fraction by a fraction by a fraction just so your not going to be confused. Step 3 is after you added all of the fractions, you simplify or reduce, divide numerator and denominator by 6 and you should get 1/2. Therefore, your final answer is 68 1/2, and Letter A.