255 in words

255 is written "two hundred fifty-five". British English inserts "and" before the final part, giving "two hundred and fifty-five"; American English leaves it out.

Where each word comes from

The same number, other ways

In words (US)

Two hundred fifty-five

In words (UK)

Two hundred and fifty-five

Ordinal

255th — two hundred fifty-fifth

Roman numeral

CCLV

Digits

255

Writing it on a cheque

On a cheque the amount line reads "Two hundred and fifty-five and 00/100" — or "Two hundred and fifty-five only" in Indian and much of Commonwealth practice. The fraction or the word "only" exists to stop anyone appending digits after what you wrote. Draw a line through any space left over for the same reason.