Final answer:
The loss derivation factor or percentage loss in power can be calculated as the ratio of the lost power to the total input power, multiplied by 100.
Step-by-step explanation:
The loss derivation factor or percentage loss in power can be calculated as the ratio of the lost power to the total input power, multiplied by 100. In the given example, the loss is 250 kW and the total power is 100 MW, so the percentage loss can be calculated as:
% loss = (250 kW / 100 MW) * 100 = 0.250%