Answer:
40.48%
Step-by-step explanation:
Two weeks​ ago, the cost to fly = $250
Now the cost is ​$370. With additional baggage fee. $370+$50 = $420
% Increase = 420 - 250 / 420 * 100%
% Increase = 170 / 420 * 100%
% Increase = 0.4048 * 100%
% Increase = 40.48%