Answer:
Its B. 7.7 %
Step-by-step explanation:
By putting the value of beef that is 13 in the above formula and multiply by 100 you will get 7.7 %. 7.7 percent is the conversion efficiency for beef. Conversion efficiency refers to the amount of energy which is produced after the input of some material or substances. In beef, more energy is produced as compared to other materials when input of 1 kilogram is consumed.