year 20x8 20x9
total expenditure on aviation fuel $m 600 1,440
total distance flown km million 4,200 4,620
fuel price index 120 240
the following statements relate to the changes between 20x8 and 20x9
the answer is that the quantity of fuel consumed increased by 20%
pls, help me solve this i tried hard to get it right but i could not.