conversations.from: human
conversations.value: In a 60-item exam, Liza got 90% of the items correctly. Her best friend, Rose, got 2 more correct answers than her. How many incorrect answers did Rose have?
  Give me a clear explanation.
conversations.from: assistant
conversations.value: Liza got 60 x 90/100 = 54 of the items correctly.
  So, Rose got 54 + 2 = 56 of the items correctly.
  Thus, Rose had 60 - 56 = 4 incorrect answers.