# Relative Frequency

How often something happens divided by all outcomes.

Example: if your team has won 9 games from a total of 12 games played:

- the Frequency of winning is 9
- the Relative Frequency of winning is 9/12 = 75%

All the Relative Frequencies add up to 1 (except for any rounding error).

### Example: Travel Survey

92 people were asked how they got to work:

- 35 used a car
- 42 took public transport
- 8 rode a bicycle
- 7 walked

The Relative Frequencies (to 2 decimal places) are:

- Car: 35/92 =
**0.38** - Public Transport: 42/92 =
**0.46** - Bicycle: 8/92 =
**0.09** - Walking: 7/92 =
**0.08**

0.38+0.46+0.09+0.08 = **1.01**

(It would be exactly 1 if we had used perfect accuracy),

Try it for yourself: