global

def format_duration(duration)
  seconds = ((duration % 60) * 100.0).round / 100.0   # 1.8.7 safe .round(2)
  seconds = seconds.to_i if seconds.to_i == seconds   # drop that zero if it's not needed
  message = "#{seconds} second#{seconds == 1 ? "" : "s"}"
  message = "#{(duration / 60).to_i} minute#{(duration / 60).to_i == 1 ? "" : "s"} and " + message if duration >= 60
  message
end