display 5 instead of 5.00 with decimals

Hi,

Is there a rails wide solution that would show decimals like "5.00" as
"5" in both views and forms?

I guess it would presume overwriting the BigDecimal class, but I have
no idea how.

Not Rails wide, but just use to_i() in your views...

x = 5.00
x.to_i # -> 5

I wouldn't recommend overriding BigDecimal's default display...