Some newer players ask me what the percentages actually mean in a public preset.
Simply put, take an ability percentage and multiply it by the number of cards with that ability in the deck, and that's the chance that during any given match, the ability will show up.
Example: Stop Opp Ability [25% of the time] (two cards have SOA)
This means that, with this deck, you will have a LEAST one SOA card for 50% of your matches. Alternatively, there is a 25% chance that any one of your four cards will have SOA for a battle.
For bonuses, it's rather straight-forward.
Mono-decks: the percentage is, obviously, always 100%... you'll always get the bonus.
Dual-decks: don't mess with the "Clan+Clan" percentage. It's already accurate. [51.4% of the time] means that for 51.4% of matches, you'll get exactly two cards from each clan in your deck. Below the Clan+Clan percentage are two other percentages -- one for each clan in your deck. Take each percentage and add it to the Clan+Clan percentage. This is the chance that the given clan's bonus will make it into a battle. Example:
Pussycats + La Junta [51.4% of the time]
Pussycats [24.3% of the time]
La Junta [24.3% of the time]
Add 24.3% to 51.4%, and you get 75.7%. The gist is, you'll get the Pussycats bonus in 75.7% of your matches (and the same for La Junta). Of course, this means that in 24.3% of matches, one clan will NOT get their bonus. This is the obvious risk of playing with two clans. Hope my math is accurate, and good luck!!