A teacher writes two equations as shown.

J = 3/8 (1/3 - 2/5)
K = 3/4 (2/3 - 5/6)
Part A Solve both equations. Express your answer as a fraction in simplest form. Show your work.

Part B What is the sum of J and K ? Express your answer as a fraction in simplest form. Show your work.

Part C What fraction when added to the result of Part B would equal zero? Explain your answer.

Part D Create a real-world situation to represent the description in Part C.