def round_tat(num):
	"""Changes the turnaround time from a float into natural language hours + minutes."""
	remain = num%1
	if num.is_integer():
		if int(num) == 1:
			return str(int(num)) + " hour."
		else:
			return str(int(num)) + " hours."
	else:
		if num < 1:
			return str(int(remain*60)) + " minutes."
		elif num-remain == 1:
			return str(int(num-remain)) + " hour and " + \
					str(int(remain*60)) + " minutes."
		else:
			return str(int(num-remain)) + " hours and " + \
					str(int(remain*60)) + " minutes."