Exercise

# Using ratios to describe the frequency of a name

In the video, you learned how to find the difference in the frequency of a baby name between consecutive years. What if instead of finding the difference, you wanted to find the ratio?

You'll start with the `babynames_fraction`

data already, so that you can consider the popularity of each name within each year.

Instructions

**100 XP**

- Arrange the data in ascending order of name and then year.
- Group by name so that your mutate works within each name.
- Add a column
`ratio`

containing the**ratio**(not difference) between each year.