default doesn't mean only, from memory Rakudo smooshes Rats into floating point Nums when the denominator gets above 2 to the 64th or so. FatRat are an infinit

default doesn't mean only, from memory Rakudo smooshes Rats into floating point Nums when the denominator gets above 2 to the 64th or so. FatRat are an infinite precision rat. FatRats, like RATs are Cool (which is a double entendre, because Cool means it knows how to be a string, which is apparently "Cool") The default recently has not been fatrat but one of the many benefits of a language under development for 20 years is that quite possibly that default was changed last weekend. Or maybe fatrat were default for a painful week back in '02. Probably not, but it could have happened. Perl does the right thing but if you're really unhappy about not using floats you can force a .num conversion into floating point or you could express a number in scientific notation to force floats. Perl really wants to make a division problem into a Rat unless you work hard to stop it. In general, for the past 30 years or so, if you're doing something weird, Perl will work and probably give faster and possibly more accurate results than most other tools, but the rest of the world will not be interested in debugging perl6 but will instead be asking "why you use perl6 instead of Gnu-R or mathematica or ?" or whatever is trendy momentarily today. Perl will never be trendy yet the whole world runs on it.