Why are per gallon gasoline prices at the pump always end in 9/10's of a cent?

I'm talking about in the United States, don't know if it's like that in other countries.
What sense does it make to have the prices in fractions of cents?

Rasputin2013-09-20T06:51:32Z

Favorite Answer

It started back in the 1920's as a greedy marketing ploy to make people think that gas was a penny cheaper than it really was (back when it was only around 18 cents per gallon). The idea stuck and it's just common practice now, even though a penny per gallon difference is no longer significant.

Lady Silver Rose * Wolf2013-09-20T14:52:57Z

Just like in the UK where it's 138.9p
[currently ranging between 134.9 and 144.9 depending on where you go]

It's the same with anything ending in '9p' - it's a ploy to make you think you're getting a bargain.

Shades of Grey♥2013-09-20T22:12:14Z

For the same reason things are priced at $14.99 instead of $15.00 ~ we see that big "14" and forget about the ".99".

Leprosy2013-09-20T20:03:23Z

Poor marketing. Intelligence insulting. Makes me want to not even buy gas.

Peepaw2013-09-20T15:59:50Z

I was born in 1953, and ever since I can remember it has been that way.