What are the pull rates for random packs?

Every card pack follows the same rules for pull rates. 

Each pack contains six cards:

• 3 Common
  
• 2 Uncommon
  
• 1 Rare or Mythic

Approximately 10% of packs will have the Mythic upgrade.
Just over 14% of packs will upgrade one or more cards to wild card(s).
Just over 14% of packs will upgrade one or more cards to Prestige (premium) versions.

Note: This information can also be found in-game by clicking/tapping the “information” icon on the pack purchasing page.