问题
选择题
一双鞋子,如果卖100元,可赚25%,如果要卖90元可赚( )
|
答案
{90-100÷(1+25%)]÷[100÷(1+25%)],
=[90-100÷1.25]÷[100÷1.25],
=[90-80]÷80,
=10÷80,
=12.5%.
答:要卖90可赚12.5%.
故选:C.
一双鞋子,如果卖100元,可赚25%,如果要卖90元可赚( )
|
{90-100÷(1+25%)]÷[100÷(1+25%)],
=[90-100÷1.25]÷[100÷1.25],
=[90-80]÷80,
=10÷80,
=12.5%.
答:要卖90可赚12.5%.
故选:C.