400 in Roman Numerals

The number 400 in Roman numerals is written as CD.

What is 400 in roman numerals?

To convert the number 400 into Roman numerals, we first need to write it in its expanded form. This can be done by breaking down 400 into its constituent parts, which in this case would be 500 - 100.

Next, we replace each number with its corresponding Roman numeral symbol. So we get (D - C).

Finally, we combine all the symbols together to get the final answer: CD.

Therefore, 400 in Roman numerals is CD.