The numeral IX is written as X (10) - I (1), which equals 9. While Roman numerals (unsurprisingly) date back to ancient Rome, they are used in many facets of society beyond the Super Bowl ...

Roman numerals get nine by putting I, which equals 1, before X, which equals 10, to essentially indicated 10-1=9. For comparison, when I appears after X, as in XI, that indicates 10 + 1 ...

Now you can convert. You cannot write X seven times, because you usually only write a maximum of three of the same numeral in a row. So you need to break it down further and think about the Roman ...