From @ShimmerFairy

$ perl6 -e 'say (1/10).perl; say (1/5).perl; say (1/2).perl;'
1/10
1/5
1/2

The output should be​:
.1
.2
.5

Under S02/The Num and Rat Types​: "The |.perl| method will produce a
decimal number if the denominator is a power of 10, or normalizable to a
power of 10 (that is, having factors of only 2 and 5 (and -1))."

From @pmichaud

Now fixed in fd2704355e.

Pm

@pmichaud - Status changed from 'new' to 'resolved'