306 in words

306 is written "three hundred six". British English inserts "and" before the final part, giving "three hundred and six"; American English leaves it out.

Where each word comes from

The same number, other ways

In words (US)

Three hundred six

In words (UK)

Three hundred and six

Ordinal

306th — three hundred sixth

Roman numeral

CCCVI

Digits

306

Writing it on a cheque

On a cheque the amount line reads "Three hundred and six and 00/100" — or "Three hundred and six 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.