The number 185 is spelled out as one hundred eighty-five.
It should not contain words besides the numbers, such as and (and is only used to express fractions or decimals after the whole number). There should be a dash between the tens and ones spot.
You can read more about it here: Grammar Book: http://www.grammarbook.com/numbers/numbers.asp
Chicago Manual of Style: http://www.grammarly.com/answers/questions/6460-numbers-spelled-out/
Purdue OWL: https://owl.english.purdue.edu/owl/resource/593/01/
Second answer (reference Oxford English)
One hundred and eighty-five is correct in Oxford English. I presume some places may have different rules about how numbers should be written.
If the two last digits of a number that is three or more digits long are not "00", it is grammatically correct to add "and". Here are several examples.
The rule may differ elsewhere. There is a lot of conflicting information due to different forms of the English language, but what I have explained is the standard Oxford English rule.
You can read about the Oxford English rules here: http://www.oxforddictionaries.com/us/secondary/harts_rules/11-1-numbers-general-principles
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Grammatically speaking, the number 185 is spelt one hundred and eighty-five, when spoken aloud and written.
In writing, if you wrote it as "one hundred eighty-five", it does not sound right nor does it sound like how you would normally pronounce it in numerical form.
Incorrect use:
40% of 185= 40% * 185= 0.4 * 185= 74
27% of 185= 27% * 185= 0.27 * 185= 49.95
70% of 185= 70% * 185= 0.7 * 185= 129.5
It is A/185.
It depends on whether it is 185 kilometres or 185 metres or 185 millimetres, etc