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标题: 5.3机经数学题求解 [打印本页]

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作者: Nefertarismile    时间: 2016-5-3 18:23
标题: 5.3机经数学题求解
Xis greater than y 20 percent, y is greater than z 20 percent, w is less than x20 percent, how much percent greater than z is w ?

求大神解答下答案是15.2%还是23.7%？

X is greater than y 20 percent 意味着 x=1.2y 还是 y=0.8x？

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作者: fengnewstart    时间: 2016-5-3 19:02
X is greater than y 20 percent是x=1.2y。 Than 后面的变量是基数，在这个基数的基础上增加百分之20 就是1.2倍的这个基数

x=1.2y
y=1.2z
w=0.8x  求w=__z

w=0.8x=0.8*(1.2y)=0.8*[1.2*(1.2z)]=0.8*12.*1.2z=1.152z

所以是15.2%

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