[
  "Look at the first two numbers: 12.75 and 12.25. Their difference gives the step.",
  "12.75 - 12.25 = 0.50. Each term is 0.50 less than the previous one.",
  "12.25 - 0.50 = 11.75. 11.25 - 0.50 = 10.75."
]