请教taotao数学section1-Q17

In Town X, 64 percent of the population are employed, and 48 percent of the population are employed males.  What percent of the employed people in Town X are females?

请指教！！！谢谢

设：employed male=a, employed female=b, population=n

已知：(a+b)/n=64%, a/n=48%, 求 b/(a+b)=？

解：由上两个式子可知（相比）：a/(a+b)=48/64, 则 b/(a+b)=1-a/(a+b)  这样很容易算出来了

恩，我也是这样算得，可答案给的结果不一样。现在看来应该是答案给错了。
太谢谢了！！!