[
  "Convert both mixed numbers to improper fractions. Find the LCM of 2 and 6 (which is 6) as the common denominator, then subtract.",
  "6 1/2 = 13/2 = 39/6. 2 5/6 = 17/6. 39/6 - 17/6 = 22/6.",
  "22/6 simplifies to 11/3 = 3 2/3. Answer: 3 2/3 (option B)."
]