Harvard Business Review:

When research participants were trying to save money on shopping-list items, slow-tempo classical music provided them with relief from math anxiety and made them less likely to avoid arithmetic computations such as figuring out whether it would be cheaper to buy a product as part of a bundle, says a team led by Shan Feng of William Paterson University.

Fast-tempo classical music, by contrast, made math-anxious people more likely to avoid computations. Past research suggests that two-thirds of adult Americans loathe math.

SOURCE: Does Classical Music Relieve Math Anxiety? Role of Tempo on Price Computation Avoidance