MLA Guide for Writing Numbers in Academic Papers
✔Use words to spell out numbers that can be written in one or two words.
to spell out numbers that start a sentence. NEVER begin a sentence with a numeral!
for numbers that are followed by a technical unit of measurement.
for numbers you are comparing or listing more than one. (e.g. 7 out of 12)
if they are paired with abbreviations or symbols. (e.g. 27 lbs.)
in decimal fractions.
in page references.
✔To form the plural of a number, treat the word like an ordinary noun. (e.g. sixes, sevens)
✔You can use a mix of words and numerals if the number is large (e.g. 23 million)
✔Be sure to maintain consistency by expressing related numbers in similar style.
✔Use hyphens in two-word numbers up to ninety-nine. (e.g. one hundred fifty-eight thousand)