While 90 percent of the energy in the electricity may be converted to heat energy, very little of the availability or capacity of the electricity to perform work is used.
(90 percent of the energy in the electricity; may be converted; to heat energy) (very little of the availability or capacity of the electricity; is used; )
90 percent of the energy in the electricity very little of the availability or capacity of the electricity
may be converted is used
to heat energy