Bad Math

I saw this story about music having fewer explicit lyrics recently. Which I found somewhat interesting and should make Tipper Gore happy. That, however, was not what caught my eye. 

According the the story's headline: "The percentage of explicit songs on Spotify’s Top 50 chart has fallen from 74% in 2018 to 13% today."

And I thought "Thirteen percent of fifty is not an integer." Seventy-four percent of fifty is 37. But thirteen percent of fifty is 6.5. So was one song only half explicit?

At first I thought this was a case of dumbing the math down for a mass audience. The number of songs with explicit lyrics was either 6 or 7, I assumed. Then I did the math. What is strange is that 6 songs would be 12% and 7 songs would be 14%. So how did they come up with 13% or six and a half songs? I don't know. I suspect bad math. Maybe the author didn't know how to compute percentages correctly. 

Have you seen example of bad math in the media? Let me know in the comments below.