fill in the blank question\nthe ratio of work to work is called efficiency.\nneed help? review these concept…

fill in the blank question\nthe ratio of work to work is called efficiency.\nneed help? review these concept resources.\nread about the concept
Answer
Brief Explanations:
Efficiency is defined as the ratio of useful work output to total work input. Useful work is the work that actually contributes to the desired outcome, while total work includes all the work done, including any wasted or non - productive work.
Answer:
useful; total