code: def pertotal(table, option):
      
      if option == 'table':
          total = sum([i for line in table for i in line])
      t = []
      for row in table:
          t_row = []
          if option != 'table':
              total = sum(row)
          for i in row:
              if total == 0:
                  t_row.append(0)
              else:
                  t_row.append(i/total*100)
          t.append(t_row)
      return t
docs: calculate percent of total