What percent of the energy animals get from
food is lost as bodily waste?

roughly 90 percent of stored energy is lost as waste heat each time

In general, roughly 90 percent of stored energy is lost as waste heat each time you go up the food chain by one trophic level. In other words, animals, on average, convert just 10 percent of the energy available from the organisms they eat into stored chemical energy.

Explanation:

the supermassive black hole is in the middle of the galaxy.