Read numbers with their context attached

A number needs a frame

Numbers can feel precise even when the comparison behind them is unclear. Before reacting to a percentage or total, look for the unit, time period, group being measured, and source. A rise from a small starting point can sound dramatic as a percentage. A large total may cover a long period or include several categories. These details do not make a number unhelpful; they show what question it can answer.

Look for the method as well as the headline figure. Was the count based on a survey, a complete record, an estimate, or a sample? Who was included, and who was not? If a story compares two periods, check that the categories and measurement methods stayed consistent. When the page leaves these details out, describe the number narrowly and avoid using it to explain a cause the data did not measure.

Worked example and a number check

In a fictional reading-club poll, 18 of 30 people say they prefer afternoon sessions. That is 60 percent of the people who answered, not necessarily 60 percent of all residents. If attendance was voluntary, people with a strong preference may have been more likely to reply. The figure describes the responses collected; it does not establish a town-wide preference or explain why people chose that answer.

1. Write down the numerator, denominator, and unit behind the displayed number when available.
2. Record the time period and group measured, then check whether a comparison uses the same frame.
3. Look for a methods note that explains collection, sampling, and missing responses.
4. Draft a cautious sentence that says exactly who or what the number describes.