Answer:
Fall by 18.6%.
Step-by-step explanation:
Calculation for quantity of round-trip tickets purchased
Using this formula
Quantity of round-trip tickets purchased=Round-trip rail fare*Fares percentage
Let plug in the formula
Quantity of round-trip tickets purchased=30%*0.62
Quantity of round-trip tickets purchased=0.186*100
Quantity of round-trip tickets purchased=18.6%
Therefore one would expect the quantity of round-trip tickets purchased to:Fall by 18.6%.