In aerobic respiration, how much energy is not converted into usable energy?

Question

In aerobic respiration, how much energy is not converted into usable energy?

Answer 1

Efficiency of transfer of energy in aerobic respiration is=1162.8/2880=40.4%.

The amount of energy captured as ATP during aerobic respiration is 19 times as much as for anaerobic respiration.From this point of view Aerobic respiration is more efficient than anaerobic respiration.This is because a great deal of energy remains locked within lactate and ethanol.