When did Gs become Ks?

[Lowexpectations]

Mille is thousand in Latin, m = thousand and mm = a thousand thousands

[jtab4994]

Originally Posted by Major Barbara

No, it actually doesn't make sense, as while M in Roman numerals is equivalent to one thousand, MM is equivalent to two thousand. Not one million.

Context is everything. In algebra "AB" means A times B, ergo MM means M times M. If the parties agree that MM means 1 million then it makes sense.

[chuckmann]

Originally Posted by Lowexpectations

Mille is thousand in Latin, m = thousand and mm = a thousand thousands

Actually, MM means 2,000. It is only by usage in the brokerage industry that MM came to designate 1,000,000.

You can read more about the proper handling of large numbers in the roman system HERE

For large numbers, the Romans placed a partial frame around numbers (open at the bottom), which indicated that the framed number was to be multiplied by 100000,

[sheena12]

Originally Posted by TamaraSavannah

According to Wiki
https://en.wikipedia.org/wiki/1000_%...opular_culture
"Grand" is slang.

I have never seen or used the term "G" and yes, it is slang for "grand". It was used in old mobster movies.

In real estate, at least since the 80s when I bought my first house for 120K. It's also easier to type.

[Lowexpectations]

Originally Posted by chuckmann

Actually, MM means 2,000. It is only by usage in the brokerage industry that MM came to designate 1,000,000.

You can read more about the proper handling of large numbers in the roman system HERE

For large numbers, the Romans placed a partial frame around numbers (open at the bottom), which indicated that the framed number was to be multiplied by 100000,

The post you quoted had nothing to do with Roman numerals, it's also used in other financal functions other than brokerage firms