How about just specifying decimal precision on the sprintf: 

> perl -e 'print sprintf("%.0f%", 1/30*100)'
3%

[download]

Update: Aside from sprintf formatting, if what you're really trying to do is compare two floating point numbers for Test::More, you might want to look at Test::Number::Delta, which I wrote to avoid that kind of roundabout way of comparing numbers. E.g.

use Test::More tests => 1;
use Test::Number::Delta within => .01;
my $percent = 1/30;
delta_ok( $percent, 0.03, 'values within 1%');

[download]

-xdg

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In reply to Re^2: sprintf percent formatting by xdg
in thread sprintf percent formatting by tphyahoo

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