Also to know is, how do you spell one and a half?
In “number + noun” of the CMOS hyphenation table, you say “Hyphenated before a noun, otherwise open.” You include the following examples: “a one-and-a-half-inch hem” and “one and a half inches.” As “inch” is a noun and “one and a half” is a number/quantity, why not “one-and-a-half inches”?
Likewise, is Half Full hyphenated? you don't need a hyphen between half and full. However, if we put the words half full before the word glass so that they are acting as a compound modifier, then it makes sense to use a hyphen.
In this regard, is there a hyphen in part time?
Is part time or full time as used in both examples one word, two words or does it need to be hyphenated? When part-time or full-time precede a word, they are always hyphenated, as in part-time faculty members and full-time students.
How do you write half?
It is acceptable to write one half as a hyphenated word, "one-half" or non-hyphenated, "one half".