[
  "Draw a bar model: the $1000 amount is not needed. Find the fraction remaining after giving to the daughter, then find 7/8 of that remainder.",
  "Remaining after giving 1/5 = 1 - 1/5 = 4/5. Saved in bank = 7/8 x 4/5 = 28/40 = 7/10.",
  "Mrs Gan saves 7/10 of her money in the bank. Answer: 7/10 (option D)."
]