This image appeared on line without attribution. It’s been reposted so many times, it’s tough to say, but it’s probably from a college. One would imagine there’s a second set of eyes reviewing such things. As time goes on, we’ll start to categorize the nature of these errors. Indeed 20 is 1/3 of 60, but the full pie chart is 80 (million). We’ll file this under fractions.
From RationalWiki –
Innumeracy is a term used to refer to a growing trend in the inability of people to understand numbers, statistics, and probabilities. The first use of “numeracy” as an analogue to literacy was in a 1959 report by Geoffrey Baron Crowther and the derivation “innumeracy” was coined by Douglas Hofstadter and popularized by the book of the same title by John Allen Paulos.
This site is an ongoing project, for the purpose of gathering examples of innumeracy and to start a dialog discussing how we can find ways to bring numeracy to the population. Please note, we are not associated with either Douglas Hofstadter, nor John Paulos. I am a fan of both gentlemen, but do not know them personally.
More important, this site was inspired by the encouragement of members at Mathematics Educators, a site within the Stack Exchange community. Many of the examples will come from the discussion there titled Examples of Innumeracy. I hope to build a membership of readers who will offer their own examples from their own experience.