Question

What is the unit for efficiency?

What is the biggest number the
efficiency can be?
How do you work out the % efficiency?

Answer 1

Efficiency has no physical units (example .85 = 85%)

The largest number would be 1 or 100%

An example of efficiency is: work out/work in

or (work in - work lost to friction) / work in would be an example of the efficiency of the process