> Few or none have made it the default because they're ignominiously slower than binary floating-point. You can strike the "none". Perl 6 uses rationals (Rat)

> Few or none have made it the default because they're ignominiously slower than binary floating-point. You can strike the "none". Perl 6 uses rationals (Rat) by default, someone once told me Haskell does the same, and Groovy uses BigDecimal.