![Odani's truism for fractions that are near each other](https://blogs.sas.com/content/iml/files/2021/05/Odani2-640x336.png)
Odani's truism is a mathematical result that says that if you want to compare the fractions a/b and c/d, it often is sufficient to compare the sums (a+d) and (b+c) rather than the products a*d and b*c. (All of the integers a, b, c, and d are positive.) If you