In the absence of specific instructions, use your own judgment to format approximations of other lengths of time.
The manual is silent about approximations of weeks, decades, or centuries.
Whole millions and billions (and in American usage, trillions) can be expressed as a whole number plus the word “million,” “billion,” etc.
When using abbreviations for units of measurement in your writing, always express numbers as numerals.
Look at the base expression: 7-point scales, two-way interactions, 6-year-olds.
For the number in the base expression, follow the usual format (word or numeral); then add the second number in the other format.numbers that represent statistical or mathematical functions, fractional or decimal quantities, percentages, and ratios examples: multipled by 5, .33 of the..., more than 5% of the sample..., a ratio of 15:1 d.numbers that represent time, dates, ages, scores, points on a scale, exact sums of money and numerals examples: 1 hr 34 min., at am, 2-year olds, score 5 on a 12 point scale Use numbers expressed as words: a.Type symbols such as "$" for money amounts and percentages in MLA.Use consistent order for information in dates: day-month-year with no punctuation (12 January 1990) or day-month-year with a comma after the day and another after the year unless the date appears at the end of a sentence (January 12, 1990).This can be a sensible approach to ensuring the readability of texts that refer to numbers and figures frequently.Fractional quantities of larger numbers, such as those in the millions and billions, are most easily read when abbreviated as decimals in combination with the word “million” or “billion” where possible. numbers 10 and above examples: 12 years old, the 57th trial, 12 cm wide b.numbers that precede a unit of measurement examples: 5-mg dose, 36.3 mm c.Following those standards throughout your paper not only with citations, but also for other elements of format such as the use of numbers, constructs an easy-to-read document that shows your attention to detail.According to the MLA Handbook for Writers of Research Papers (Seventh edition), for most MLA style papers, spell out numbers written in one or two words such as "two" or "three hundred." If you begin a sentence with a number, spell it out, even if it is a date or other number that uses more than two words.