conversations.from: human
conversations.value: Provide a step by step solution for the following math problem: Alani earned $45 for 3 hours of baby-sitting. At the same rate, for how many hours would she need to baby-sit to earn $75?
conversations.from: assistant
conversations.value: The rate is $45/3=$15/hr.
  She would need to baby-sit for $75/$15=5 hours.