By what percent is the average export of country T over all the given years more than the average export of country R over all the given years?

  Total export of country T
  = 60 + 50 + 55 + 100 + 110
  = 375
  Average export of country T
  = $$\frac{375}{5}$$
  = Rs. 75 crore
  Total export of country R
  = 50 + 55 + 70 + 90 + 65
  = 330
  Average export of country R
  = $$\frac{330}{5}$$
  = Rs. 66 crore
$$\eqalign{ & \therefore \text{ Required } \% \cr & = \frac{75 - 66}{66}\times100 \cr & = \frac{9}{66}\times100 \cr & = \frac{150}{11}\% \cr & = 13\frac{7}{11}\% \cr} $$