““the early 1980s, the A&W fast-food restaurant chain introduced a burger with a third of a pound of beef to compete with McDonald’s popular quarter pounder. Although most customers preferred A&W’s new burger in taste tests, it was a big disappointment in the marketplace. When focus groups were run to get to the bottom of this paradox, A&W discovered that many customers thought a burger with one-third of a pound of beef was less generous than one with one-quarter of a pound. Customers were attending to the denominator, just not very intelligently: The smaller “3” led many to conclude that one-third is smaller than one-quarter!21””
