[
  "Separate the whole number from the decimal part. Write the decimal part as a fraction over 10 (1 decimal place), then simplify.",
  "3.4 = 3 + 0.4. 0.4 = 4/10. Divide by 2: 4 / 2 = 2, 10 / 2 = 5. So 4/10 = 2/5.",
  "3.4 = 3 2/5. Answer: option D."
]