1) Divide 3/4 by 1/2. Remember how to divide fractions. Switch the problem into a multiplication problem.
3/4 x 2/1 = 3/2 (so you could only have 1 and 1/2 servings with 1/2 pound of chicken in each serving.
2) Set up a little algebra problem. Let x = the multiplier of the original 3/4 pounds of chicken needed to make two full servings with 1/2 pound of chicken in each.
(3/4)x = 2(1/2) (Found this online V(0-0)v)
