To find the answer, we just have to look for the complement fraction of 9/10, which is found by subtracting from 1
[tex]1-\frac{9}{10}=\frac{1}{10}[/tex]
Hence, the energy passed to a cow is 1/10.
Observe that the complement of 9/10 is the answer because that's the amount of energy that stays in the plant.
