Science, Maths & Technology
Diagrams, charts and graphs
...simple calculations. For example, in 1991, the total number of households surveyed was 22.4 million, so the actual number of four-person households surveyed is found by calculating 16% of 22.4 million, which is 3584 000 households. (Because 22.4 million is a rounded figure, this number of households will not be exact.) Since each column in the table should include all the...