Template:Frac/doc
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This template builds nicer-looking common fractions. It takes one, two or three parameters: the optional integer (maybe signed), the optional numerator and the required denominator; in this order.
{{frac|a|b|c}}- a b⁄c (integer, numerator and denominator)
{{frac|a|b}}- a⁄b (numerator and denominator)
{{frac|a}}- 1⁄a (denominator only)