397 in Roman Numerals

Roman numerals like Henry I, Henry II, etc., use symbols for representation. Earlier civilizations counted using fingers, sticks, bones, etc. As life became more complex, a standard form was needed for counting. Ancient Romans used the Roman numeral system to count. The symbols used are I (1), V (5), X (10), L (50), C (100), D (500), and M (1000).

In Roman numerals, we use CCCXCVII to represent 397. Here, CCC is 300, XC is 90, and VII is 7. Let’s learn more about Roman numerals and how we write them.

Certain basic rules must be remembered when writing a number in Roman numerals.

Rule 1: Addition Method

The addition method is used when the smaller number is placed after the larger number. For example, VII → V + II → 5 + 2 = 7.

Rule 2: Repetition Method

Certain Roman numerals can be repeated up to three times to write a larger number. For example, CCC → 300.

Rule 3: Subtraction Method

If a smaller number precedes a larger number, it is subtracted. For example, XC → C - X → 100 - 10 = 90.

Rule 4: Limitation Rule

Symbols cannot be repeated more than three times. Symbols like V, L, and D cannot be repeated. For example, we won't write VV for 10; instead, we use X, and for 8, we write VIII, not IIIIIIII.

Let’s now learn how to write 397 in Roman numerals using different methods.
 

• By Expansion Method

• By Grouping Method

In the expansion method, based on place value, the number is broken down.

To write 397 in Roman numerals, follow these steps:

Step 1: Break down the number based on place value: 300 + 90 + 7.

Step 2: Convert each number into Roman numerals:

300 in Roman numerals — CCC

90 in Roman numerals — XC

7 in Roman numerals — VII

Step 3: Combine the Roman numerals: Therefore, 397 in Roman numerals is CCC (300) + XC (90) + VII (7) = CCCXCVII.

When writing a large number into Roman numerals, we group the number. 

To write 397 in Roman numerals, we group 397 as 300 + 90 + 7:

300 in Roman numerals — CCC

90 in Roman numerals — XC

7 in Roman numerals — VII

So, 397 is written as CCCXCVII in Roman numerals.

Roman numerals follow a pattern that makes them look similar. Here are some numbers related to the Roman numeral 397:

CCCXCVII = 397
CCCXCVIII = 398
CCCXCIX = 399
CD = 400
CDI = 401

• Addition rule: Used when a larger numeral is followed by a smaller one, and the values are added. For example, VII = V + II = 5 + 2 = 7.

• Grouping method: The given number is grouped based on place value and converted into Roman numerals. For example, 397 = 300 + 90 + 7 = CCCXCVII.

• Repetition rule: Certain symbols (I, X, C, M) in the Roman numeral system can be repeated up to three times. For example, CCC = 300 (C is repeated three times).

• Subtraction method: Used when a smaller numeral precedes a larger numeral, and the smaller is subtracted from the larger. For example, XC = C  X = 100  10 = 90.

• Limitation rule: Symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated. For example, we use X instead of VV for 10.