

Representation of Probabilities


We use fractions, percentages, and decimal numbers to represent the probability of an event. Writing a probability as a fraction, decimal, or a percentage doesn't change it. So 20% chance of rain is the same as . You could use a decimal too, and say there is a 0.2 chance of rain. Here are some conversions between fractions, percentages, and decimals.
Creative representation is an indispensable part of solving problems of using
different formats to represent probabilistic information. For example, changing
risk representations from probabilities to natural frequencies can be enormously
useful. Probabilities, especially conditional probabilities, tend to impede
human inference, whereas natural frequencies demand less computation, are
far more similar to the ways in which we experience numerical information,
and appear to help both experts and laypeople. Next : Probability vs. Statistics Previous : Misinterpretation of Probabilities 
