Question

noun from of efficient​

Answer 1

$\huge\mathfrak\purple{Heya\:Mate}$❤

Noun form of 'efficient' is 'efficiency'.

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Answer 2

Efficiency refers to very different inputs and outputs in different fields and industries. Efficiency is very often confused with effectiveness. In general, efficiency is a measurable concept, quantitatively determined by the ratio of useful output to total input.