Impossible Trivia: After this was introduced to the office, they saw a 24% decrease in errors…what was introduced?

PromotionCode.org, an online source of discount codes, added music to the office.  In fact, the company saw a 24% decrease in input errors three months after adding music to the workplace

Source: https://www.fastcompany.com/3063730/how-music-can-make-your-office-more-or-less-productive