Words or Numbers?

Usually the rule of thumb is to spell out the numbers one through ten. But the main thing you have to remember is to be consistent in what you are writing. For example if you are writing an article that has several sets of numbers you don't want to mix words with numerals so if you are going to spell out 'ten' then you will want to spell out 'one hundred' or if you are using '100' then you will want to use '10'. Always spell out simple fractions (one-third) but mixed fractions can be used as figures instead of words unless its at the start of a sentance. (4 1/2 or Four and one-half) When writing decimals you are going to want to use the figures (0.25) -- I hope this helps you out some, let me know if it has been helpful, thank you!

In high school, I learned to spell out anything up to twenty, then use numerals for higher numbers. That is generally what I do, at least in formal writing.