conversations.from: human
conversations.value: Carol spends 4 hours writing a song, half that much time recording it, and 90 minutes editing it. What percentage of her total work time did she spend editing?
conversations.from: assistant
conversations.value: First find how long Carol spent writing the song in minutes: 4 hours * 60 minutes/hour = 240 minutes
  Then find how long she spent recording the song: 240 minutes / 2 = 120 minutes
  Then add up all her work time to find the total work time: 240 minutes + 120 minutes + 90 minutes = 450 ​minutes
  Then divide her editing time by her total work time and multiply by 100% to express the answer as a percentage: 90 minutes / 450 minutes * 100% = 20%