Rate whose consequence is equal to one.

### Examples

- The cost of one litre of gas is $1.18: \(\dfrac{$1.18}{1\space\textrm {litre}}\)
- A ratio of 22 clients per IT expert: \(\dfrac{22\space\textrm{clients}}{1\space\textrm {expert}}\).
- A speed of 100 kilometres per hour: \(\dfrac{100\space\textrm{km}}{1\space\textrm {hour}}\).