兔占55%鸭20%鸡25%鸡的只数是兔鸭总数的百分之几?

问题描述:

兔占55%鸭20%鸡25%鸡的只数是兔鸭总数的百分之几?

25%÷(55%+20%)
=25%÷75%
=1/3
≈33.3%
答:鸡的只数是兔鸭总数的33.3%.