on average how much percentage of electricity is wasted by a household?

On average, a household wastes about 10-30% of the electricity it consumes. Some sources specify around 35%, but the common range falls between 10% and 30%. The electricity wastage is mainly due to inefficient appliances, standby power consumption (also called vampire power), poor insulation, and outdated or old equipment. Among these, standby electronics and heating/cooling systems are significant contributors to energy waste in homes.