I've noticed that Americans do not say "and" when speaking numbers: for example, 150 would be pronounced "one hundred fifty".

I and most other British-English speakers would pronounce it "one hundred and fifty".

I've seen a few different arguments on the net about which is "better", and something that is often asserted on the American side is that the "and" represents a decimal point - so "one hundred and fifty" would be interpreted as 100.50.

This struck me as odd, since although I see a lot of American movies and TV, I don't think I've ever heard anyone actually do this.

So my question: is this "and = decimal point" actually used in the USA, and can anyone cite some examples (maybe on youtube?)?