Season passes and add on packs are the sales of the week on the PlayStation Store with up to 70% off certain passes. The deal of the week is Plants vs. Zombies Garden Warfare 2 was has had 36% knocked off the price.
Below is a full list of the DLC, but you may want to follow this link to the PS webstore where you can see the actual prices and percentages.
DLC Deals (06/04/16 – 20/04/16)
Dragon Ball Z: Resurrection of « F » Pack
PS4 and PS3:
PS4, PS3 and PS VITA:
Digital Discounts (06/04/16 – 20/04/16)
Source: EU PS Blog