Is it mathematically correct to have a decimal as a numerator and one (1) as a denominator as in 0.5/1?

I think that it is correct because of complex fractions. For example, (1/2)/(2/3) uses fractions as both numerator and denominator. I assume that 0.5/1 is correct since it can be expressed as a complex fraction (1/2)/1.

Likewise 0.5/(6/2) will equal 0.5/3 or (1/2)/3. If 3 is changed to 1, the fraction becomes (1/6)/1.

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