1. The problem statement, all variables and given/known data If only conductive heat loss was significant for a house, then by what percentage would you lower the heat loss if the temperature was reduced inside from 73°F to 67°F, when the outside temperature is 21°F? (Hint: Try using a ratio.) 2. Relevant equations Unknown 3. The attempt at a solution I do NOT want the solution just need to know what formula i should use to find the answer. possibly a example problem but NOT the answer please, i want to learn how to do it.