Answer: a. 67.5%
Step-by-step explanation: total sum of animal is = 27+13=40
if toal animal 40 then chickens is 27
if toal animal 1 then chickens is =27/40
if toal animal 100 then chickens is =(27/40)x100=67.5%
Answer: 67.5%
Explanation:Its the only logical answer.
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