A scientist studied the energy transfer in a population of primary consumers feeding on a crop. The energy values recorded over a set period are shown in the table below:
| Energy pathway | Value |
|---|---|
| Chemical energy in ingested food (III) | 320 kJ |
| Chemical energy lost in faeces | 120 kJ |
| Chemical energy lost in urine | 16 kJ |
| Respiratory losses (RRR) | 112 kJ |
Using the equation N=I−(F+R)N = I - (F + R)N=I−(F+R), calculate the percentage of the chemical energy in the ingested food that is converted into the net productivity (NNN) of these consumers.
22.5%22.5\%22.5%
27.5%27.5\%27.5%
39.1%39.1\%39.1%
62.5%62.5\%62.5%