Today I learned that ‰ exists and is not just a weird-looking %.

Why do I have so many voids in my knowledge?
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@mandy They never teach you in school? I'm a bit surprised.
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@joe @mandy I've seen per-mille signs on a couple of indie calculators and in Unicode code-point tables, but that's about it. Never used one.
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@adiabatic @joe my first exposure to it is some parameters for linear actuator motion controls, and it is super confusing not only because of permille but some calculations are in milliamps and others are in amps.
1082552
@joe somehow it missed me or I missed it.
1082551