Using numbers for money, telephone numbers, addresses, ages, scores and statistics.
English numbers change their form, pronunciation, and grammatical behavior depending on whether they express money, addresses, ages, scores, telephone numbers, statistics, or other contextual information.
For example, 25 can be read as twenty-five, twenty-five dollars, number twenty-five, or two five depending on context.
Money amounts are normally expressed using a number followed by the currency unit or symbol.
For example, ten dollars, twenty euros, £50, and $100.
Currency can be identified with symbols or internationally recognized letter codes depending on context.
For example, $25, €40, £15, USD 25, and EUR 40.
Amounts in dollars can be expressed using dollars and cents when the subunit is relevant.
For example, five dollars and fifty cents and $5.50.
Amounts in British currency can be described using pounds and pence when the subunit is relevant.
For example, five pounds and fifty pence.
Decimal notation is commonly used for monetary amounts, especially in written contexts.
For example, $12.50 and £7.99.
Spoken monetary amounts can be expressed using the currency unit and sometimes the minor unit.
For example, twelve dollars fifty, twelve fifty, or twelve dollars and fifty cents depending on context and variety.
Currency-unit nouns normally use singular forms with one unit and plural forms with greater quantities.
For example, one dollar, two dollars, one euro, and five euros.
Numbers in addresses identify buildings, units, apartments, or other location components.
For example, 25 King Street and 14A High Street.
House numbers may be read as ordinary numbers or digit by digit depending on the address format and local convention.
For example, 125 can be read as one hundred and twenty-five or one-two-five in contexts where individual digits are emphasized.
Letters attached to house or unit numbers are normally pronounced as separate letters.
For example, 14A can be read as fourteen A.
Telephone numbers are normally read as individual digits or in convenient groups rather than as one mathematical number.
For example, 020 7946 0123 can be read digit by digit or in grouped sequences.
Zero in telephone numbers can be pronounced as zero or, informally, oh.
For example, 507 can be read as five zero seven or five oh seven.
Repeated digits may be read using double or triple in some contexts.
For example, 44 can be read as double four and 777 as triple seven.
Age can be expressed using be + number + years old or an age noun phrase.
For example, She is twenty years old and a twenty-year-old student.
When age modifies a noun directly, year is singular and the compound is normally hyphenated.
For example, a five-year-old child and a thirty-year-old building.
Scores can be expressed by stating the points or goals for each side, usually with the higher or home team first depending on context.
For example, The match ended three-two and The final score was 84–79.
Zero in sports scores has several conventional spoken forms depending on the sport and variety.
For example, zero, nil, or nil-all may occur in football contexts, while zero is common more generally.
A score such as 3-2 is normally read using the two numbers separately rather than as a single cardinal number.
For example, three-two.
Percentages are commonly used to describe proportions and statistical results.
For example, 65 percent of respondents chose option A.
Fractions can be used to describe proportions in mathematical, technical, and informal contexts.
For example, one third of respondents and two thirds of the sample.
Ratios compare quantities and are commonly expressed using to or a colon in written numerical notation.
For example, a ratio of three to one and a 3:1 ratio.
Rates express one quantity relative to another and commonly use per.
For example, 60 kilometres per hour and five dollars per kilogram.
Numbers can identify both a score and a position within a ranking, requiring cardinal or ordinal forms depending on meaning.
For example, She scored 90 points but finished second.
Numbers can identify locations within documents using either cardinal or ordinal conventions depending on the structure.
For example, page 25, Chapter 5, the fifth chapter, and Section 3.
Numbers identify physical locations such as rooms, apartments, floors, and units.
For example, Room 205, Apartment 12, and the fifth floor.
Numbers can identify transport services and are usually read as identifiers rather than ordinary quantities.
For example, Flight 205, Bus 10, and Train 82.
Product codes and model numbers are commonly read digit by digit or in groups according to established naming conventions.
For example, Model X100 and Series 5000.
Page references normally use cardinal numbers, while sequence descriptions can use ordinal numbers.
For example, page 10 but the tenth page.
Lists and numbered items can be referred to with cardinal or ordinal forms depending on whether the number acts as a label or a position.
For example, item 3 identifies a label, while the third item identifies its position.
Numbers can identify generations, versions, or iterations of people, technology, or products.
For example, the third generation and second-generation technology.
Verb agreement after a percentage depends on the noun phrase following of.
For example, Forty percent of the employees are remote, but Forty percent of the equipment is unused.
Approximation words can modify statistical numbers without changing the numerical category being expressed.
For example, approximately 30 percent, about 500 users, and nearly 2,000 responses.
Everyday speech often uses shortened or conventional forms for numbers when the context makes the intended meaning clear.
For example, a hundred, five grand, twenty quid, or two-oh-five may occur depending on register and context.
Use numbers according to their contextual function, choosing appropriate cardinal, ordinal, digit-by-digit, monetary, statistical, or identifier forms.
Common mistakes include confusing page numbers with ordinal references, using plural units in age compounds, reading telephone numbers as ordinary quantities, and confusing scores with rankings.