Write LXXXVI in numerals.

The value of L = 50, the Value of X = 10, the value of V = 5, and the value of I = 1.

According to the rules of roman numerals, when a symbol of a smaller value appears after a symbol of greater value, its value is added to the greater number whereas when a symbol of a smaller value appears before a greater value symbol, it is subtracted from the greater value.

LXXXVI = 50 + 10 + 10 + 10 + 5  +1 = 86.