求列式&答案.bag was marked 40% higher than its cost at $140.问题请看补充.(a) find the cost of the bag .(b) later it was sold at an discount of 10% .find the profit percent .

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求列式&答案.bag was marked 40% higher than its cost at $140.问题请看补充.(a) find the cost of the bag .(b) later it was sold at an discount of 10% .find the profit percent .
求列式&答案.bag was marked 40% higher than its cost at $140.问题请看补充.
(a) find the cost of the bag .
(b) later it was sold at an discount of 10% .find the profit percent .

求列式&答案.bag was marked 40% higher than its cost at $140.问题请看补充.(a) find the cost of the bag .(b) later it was sold at an discount of 10% .find the profit percent .
(1+40%)x=140,x=100
140*(1-10%)=126,126-100=26

(a),标价$140,比成本高40%,则成本=140/(1+40%)=$100
(b),标价$140,折扣10%出售,则售价=$140*(1-10%)=$126,利润=$26,利润率=26/100=26%

设成本为X : (1+40%)X=140 x=100
打折后价格 : 140(1-10%)=126
利润 :126-100=26
利润率 :26/126=20.635% 利润率=利润/收入

一个袋子标记为高出其成本40%的140美元。成本是:100美元袋子以140-140*10%也就是126美元卖出利润:126-100=26
利润率:26%

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