Moz@chevalier26 @actuallyautistic "proper fraction" is a mathematical term too: https://www.mathsisfun.com/proper-fractions.html (the rest are improper fractions. No, really).
Typically people either use decimals or fractions, not both. The combo is kind of weird because if you're going to use decimals just use decimals. 3.5/5 or 0.7... you might as well just use the latter.
The real fun is prime denominators because that tweaks people who use imperial units. It's not 15/32nds of a furlong, it's 8/17ths.
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