The following bar graph shows the sales (in thousand numbers) of scooters from six different companies in 2011 and 2012.

The average sales of companies A and E in 2011 are what percentage of the average sales of companies B and D in 2012 ?

74.36%

Average sale of B & D in 2012 = \(\frac{18 + 21 }{2}\) = 19.5

Average sale of A & E in 2011 = \(\frac{11 + 18 }{2}\) = 14.5

Required percentage = \(\frac{14.5}{19.5}\) × 100

= 74.36%