> For the complete documentation index, see [llms.txt](https://www.csvpath.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.csvpath.org/getting-started/the-flightpath-data-examples/math/percents.md).

# Percents

{% hint style="success" %}
Run this example using its test data from within [FlightPath Data](https://www.flightpathdata.com/).
{% endhint %}

```
~
   This csvpath checks if the % unique values is below 90% after at least 20% of years
   have been checked.

   id: percent unique
   validation-mode: raise, print, stop
   test-data: examples/math/Automobiles_Annual_Imports_and_Exports_Port_Authority_of_NY.csv
~
$[1*][
   @reviewed = percent("scan")
   @uniques = percent_unique.units(#"Automobile Volume")

   below( @reviewed, .20 ) -> skip()
   below( @uniques, 90 ) -> print("Line $.csvpath.line_number looks wrong: $.variables.uniques")
]
```