Fractional style shows as one number over another number. For example, you might see bet365 odds at 10/1. That means that for everyR$1 you bet, you'll receive an additionalR$10 for a winning bet. PGA odds are displayed in this format by default. Lastly, you have decimal format.
Bet Type
Bonus
Doubles
5% bonus
Trebles
10% bonus
4-folds
15% bonus
5-folds
20% bonus