The Roman numeral equivalent of 1996 is MCMXCVI. The basic Roman numeral units are as follows: I equals 1, V equals 5, X equals 10, L equals 50, C equals 100, D equals 500 and M equals 1000.
Writing 1996 as a Roman numeral requires breaking it down into 1000 + 900 + 90 + 6. The first M represents the 1000, and the CM represents 900, which is 1000 - 100. The number 90 is written as XC, which is 100 - 10, and the number six is written as VI, which is 5 + 1. The reason for using subtraction to write certain numbers is that a letter is only allowed to appear three times.