What fraction of cats are orange?

You can't determine the fraction of cats that are orange based on any scientific data. Here's why:

* Coat color is diverse: Cat coat colors and patterns are incredibly varied due to genetics. There's no single "orange cat" gene.

* Breeds matter: Some breeds are more prone to certain colors than others. For example, orange tabby is a common pattern in domestic shorthair cats.

* Regional differences: The prevalence of certain coat colors can vary depending on the region.

So, there's no definitive answer to the question!