## Ages

- Ages should be written in full from one to ten and as numerals for 11 upwards. For example: over 40, under nine
- Always use numerals and hyphens for the adjectival form, e.g. ‘8-year-old child’ or ‘80-year-old woman’

## Equation numbering

Please number all equations in your report in the following format, aligned to the right of the equation. For example:

**S= −****2.59***N*^{2}+8.74*N+*90.07 (1)

## Numbers, units and dates

- Numbers in the text should usually be written in full from one to ten and as numerals for 11 upwards
- Ordinal numbers up to and including nine in full, thereafter numerals, e.g. 21st
- However, numerals may be used for numbers less than ten if presented in parentheses, and numbers at the beginning of a sentence should always be written in full
- Numbers followed by units should always be presented as numerals
- Units of time should not be abbreviated: years, months, weeks, days, hours, minutes, seconds
- Compound units separated by a slash: kg/m2, ml (not mL)

## Percentages

- Per cent should normally be written in full; however, if this appears several times within a paragraph it is acceptable to use the % symbol
- The % symbol should always be used in mathematical and statistical contexts, tables and lists
- The % symbol must always be associated with a numeral, e.g. 7% not seven %

## Units of measurement

Units must always be use SI or SI-derived units.