Precise numbers like 40,100 can be distracting. Rounding to 40,000 makes the core message easier to grasp without losing the essential truth. 2. Ground Numbers in Familiar Scales Use "mental maps" your audience already knows.
A great guide for by Chip Heath and Karla Starr starts with their core argument: humans aren't naturally built to understand large or abstract numbers, so we must translate them into instinctive human experiences . Making Numbers Count by Chip Heath Pdf
Mapping the 13.8 billion-year history of the universe onto a 24-hour clock helps people understand when humans actually arrived (the final seconds). Resources for Deep Diving Precise numbers like 40,100 can be distracting
Instead of saying "A very small percentage of Fortune 500 CEOs are women," say "There are more men named James among Fortune 500 CEOs than there are women ". Ground Numbers in Familiar Scales Use "mental maps"