Additional APA Requirements: Numbers According to APA 7, Section 6.32, use numerals to express numbers 10 and higher (e.g., 11, 23, 256). Section 6.33, write numerals as words to convey numbers up to and including nine (e.g., three, seven, eight).
In the Seventh Edition of The American Psychological Association's (APA) Publication Manual, numbers are written in a variety of ways, depending on the nature of the work being done. In general, however, psychologists follow these guidelines: when writing about their own research, lead with the first figure quoted or cited in the article (i.e., give priority to what has been said over who said it); when writing about other people's work, include complete reference information for readers wishing to examine that work further; and finally, when using numbers in abstracts, introductions, and conclusions, follow the guidelines below.
When writing in a formal style, use sentences containing numbers up to 100. For example, say that a study examined children's performance on a task measuring visuospatial ability. When writing in an informal style, use sentences containing numbers up to 10.
In general, APA style suggests using words to express numbers less than 10, and numerals to describe numbers more than 10. A more comprehensive list is provided below. It is not necessary to use numbers beyond the thousands to achieve effective readability for an audience of scholars.
When writing numbers in terms of percentages or fractions, use the word "percent" or "per cent" followed by a percentage or fraction symbol (see table). When writing out full numbers with symbols, avoid using commas as decimal points. Instead, use either the point or the slash notation as shown in the examples below.
When writing out large numbers with no chance of confusion, it is acceptable to use words instead of symbols. For example, "a million people" can be written as 1,000,000 or M or MM or million or milli...
When writing out small numbers that are easy to confuse, it is best to use symbols because they cannot be misinterpreted. An example would be 1.5 miles which could be written as 15 m or 1.5 km. Or, there might be a number of items with prices ranging from $15 to $17. In this case, it would be best to use symbols so that they don't get interpreted separately when multiplied.
Numbers can be written as words (for example, one hundred) or as numerals (e.g., 100). In this paper, we adhere to the requirements of APA Style, which is one of the most often used style guides in academic writing. In general, numbers 0 through 9 should be written in words, whereas numbers 10 and up should be written in numerals. Also, dates should always be written in words.
You can write numbers on paper in several ways. You can use dots for thousands, commas for millions, and periods for billions. Or you can use words instead: "My phone number is xxx-xxx-xxxx." The choice is yours. Just make sure that you follow a standard format when writing numbers on papers.
Numbering your pages will help readers locate specific parts of your paper more easily. Here are some examples of how pages of manuscripts have been numbered over time: "Page 5" or "Pag e 5" or even just "5". Some people may want to know exactly where a particular quote appears in the document while others may not need to read every word of the paper. If you number your pages, then anyone reading the work will know exactly where each part of it can be found.
Using headings to identify major sections of your paper will also help readers find what they're looking for quickly. For example, if your paper was divided into three sections, it might look something like this: "Introduction", "Body", and "Conclusion".