conversations.from: human
conversations.value: Matt did his homework for 150 minutes. He spent 30% of that time on math and 40% on science. He spent the remaining time on other subjects. How much time did Matt spend on homework in other subjects?
  Can you solve this problem?
conversations.from: assistant
conversations.value: Matt spent on math and science 30% + 40% = 70% of the time.
  This means he did homework from these two subjects for 70/100 * 150 minutes = 105 minutes.
  So Matt spent 150 minutes - 105 minutes = 45 minutes doing homework from other subjects.