Question

If herbivores eat 320 kg of plants, and the total plant biomass is 1,600 kg, the _______ efficiency is ________ %.

Answer 1

The total plant biomass ( 1,600 kg ) represents 100 % and 320 kg represents x %. Then:
1,600 : 320 = 100 : x
or: 1600/320 = 100/x
When we cross multiply: 1,600 x = 32,000
x = 32,000 : 1,600
x = 20 %
Answer: c ) consumption, 20 %.