It says that Living Story Season 2 is 40% off. However, it's listing the price for the complete pack at 1600 gems. That is NOT 40% off from what it's been priced, even as recently as last week.
On one of my accounts, it's listing at 1600 gems regular price and 20% off for a total of 1280 gems for the complete pack.
On another of my accounts, it says it is 40% off from the regular price of 1600 gems for a total of 980 gems for 6 of the 8 episodes.
On another account, it says it is 50% off the price of 1600 gems for a total of 800 gems for the complete pack.
What's going on, Anet? Reddit reports differing prices and discounts too. https://www.reddit.com/r/Guildwars2/comments/71o450/living_world_season_2_on_sale/