About Probability in Plain English

Translate a decimal price into an implied percentage without treating it as a forecast.

Our focus

For decimal odds d, the implied percentage is 100/d. This describes the arithmetic of the quote. It is not necessarily the true chance of the outcome, and a complete market may contain a margin. Keep the source and timing of the quote visible, especially when comparing numbers from different displays.

Our publisher

Part of Past The Post Technolgies Pty Ltd

Probability in Plain English belongs to the collection of racing, AI and technology publications described in our website directory. Each publication focuses on a specific research question, practical method or product requirement.

Racing research

For horse racing ratings, form and related racing resources, visit PTPTips.

Editorial approach

Our guides distinguish recorded facts from interpretation, explain their assumptions and use clearly identified hypothetical scenarios for worked examples. Changing race information and commercial product details should be checked at their source.

For a question or correction, use the contact options on PTPTips and include the publication name and article URL.