That headline ran at the start of the coronavirus crisis.
Urgent. Alarming. A 50% surge in ICU patients.
But look beyond the percentage: the absolute number had risen from 2 to 3 patients. Mathematically correct: a 50% increase. But the absolute change was just one additional patient.
This is how relative changes on small numbers can create a misleading impression.
An increase from 100 to 101 carries the same absolute difference, but reads as a modest 1%. While 2 to 3 reads as a dramatic 50%. Same math. Opposite impression.
The core problem: misrepresenting data, even unintentionally, distorts our picture of reality.


