# Percent and fractions: Probability

Probability calculates the chance of something happening in the future and is measured in per cent (%). It is regularly used to predict the weather. For example, 'I predict that there is a 50% chance of rain tomorrow'.

## Quick tips for tutors

Probability includes:

- Recognising the different ways of putting a number to chance events
- Calculating probabilities of events
- Ordering events by probability
- Practising putting a number to chance events