79 = LXXIX
79 in Roman numerals is LXXIX.
Seventy-nine written with the letters L X X I X.
79 in words: Seventy-nine
Seventy-nine in Roman numerals is LXXIX. You build it as LXX (70) + IX (9), writing the larger part first and reading left to right.
Notice the subtractive pair in LXXIX: a smaller symbol sits before a larger one to save writing four identical letters in a row. This is the single rule that trips most people up, and once it clicks the rest of the system is straightforward.
How 79 breaks down
Reading LXXIX from left to right, each group is added together to reach 79:
| Group | Value | Place |
|---|---|---|
| LXX | 70 | tens |
| IX | 9 | ones |
| LXXIX | 79 | total |
Frequently asked questions
What is 79 in Roman numerals?
79 in Roman numerals is LXXIX.
How do you write 79 in words?
79 is written "Seventy-nine" in English.
What number comes before LXXIX?
The number before LXXIX is 78, written LXXVIII in Roman numerals.
What number comes after LXXIX?
The number after LXXIX is 80, written LXXX in Roman numerals.
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Last updated July 22, 2026. Reviewed for accuracy against the standard rules for Roman numerals.