经济中有很多的数学问题,其中商品销售中价格问题,就是比较简单而又很有趣的数学问题.要解决这些问题,应该知道一些商业的常识,如成本、利润、打折销售等等.事实上,我们所说的打折与我们数学中的百分率是等同的.如果说某件商品打八折,就是按原价的80%出售.另外,在商品问题中,还涉及如下几个概念:商品利润=商品售价-商品进价(有时还需减去费用);商品的利润率= There are a lot of mathematics problems in the economy, in which the issue of price in the sale of goods is a relatively simple and interesting math problem. To solve these problems, you should know some common business knowledge, such as cost, profit, discount sales, etc. We say that the discount is equivalent to the percentage in our mathematics. If we say that a certain product is discounted by 20%, it is sold at 80% of the original price. In addition, in the commodity problem, the following concepts are also involved: Commodity profit = Product price - the purchase price of the product (sometimes minus the cost); the profit rate of the product =