How many people know modern dancing?

There isn't a specific number of people who know modern dance. However, it is considered to be a popular and widely practiced form of dance. Modern dance evolved in the early 20th century and has since spread worldwide, gaining a considerable following among dancers, performers, and enthusiasts.

Given its global reach and the fact that modern dance encompasses various styles and techniques, the number of people who know modern dance can span a broad range, from recreational dancers and hobbyists to professional dancers and dance educators.