要确定价格代表了多少折扣或涨了多少价,就需要计算成本节约率。[1]
这种基本的计算不需要使用高级代数或微积分。你可以在类似EXCEL这样的电子表格中设置计算,也可以手工计算。你得首先弄清楚现价、折扣价格和原价。
步骤
方法 1 的 2:
手工计算
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1
确定产品或服务的原价。对大多数商品而言,原价是指没有使用任何优惠券或折扣的零售价。
- 例如,一件毛衣的原始零售价是50元,那原价就是50元。
- 对于按小时计费的服务,用计费的小时数乘以标准费率。
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2
确定产品或服务的实价。这是使用了促销、折扣、优惠券或降价后的价格。
- 例如,假设在使用了所有折扣后,这件毛衣只要40元,那它的实价就是40元。
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3
确定差价。用原价减去实价即可得出。[2]
- 在本例中,差价就是用原价50元减去40元,等于10元。
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4
用差价除以原价。本例中,用10元除以50元原价,等于0.2。
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5
将小数点乘以100(或将小数点往右移两位)换算成百分数。本例中,即0.2乘以100,或20%。也就是说买这件毛衣节约了20%。[3]
方法 2 的 2:
用电子表格计算
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1
在A1单元格输入产品或服务的原价,按回车键。假设一台风扇的原价是200元,在A1中输入“200”。
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2
在B1单元格输入所有折扣后的最终价,按回车键。假设你买这台风扇最终花了150元,那就在B1中输入“150”。
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3
在C1单元格中输入公式“=A1-B1”并按回车。然后EXCEL会自动计算出两个价格的差价,同时在该单元格中显示相关数值。
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4
在D1单元格输入公式“=C1/A1”并按回车。然后EXCEL将用差价除以原价。
- 在本例中,如果公式输入正确,D1的数值应该是0.25。
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5
光标选中D1单元格,按住“CRTL+SHIFT+%”。这样EXCEL会将小数点转换成百分数。[4]
- 本例中,D1的数值应该是25%。也就是说你买这台风扇节约了25%。
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6
在A1和B1输入新值,可以计算其他买卖的成本节约率。由于你已经在其他单元格输入了公式,因此当你改变原价或现价或两者都改变时,EXCEL会自动更新成本节约率。
- 假设你还花了10元买了一盏灯,原价是17元。在A1输入“17”,B1输入“10”,其他不变,则D1会显示出相应的节约率为41%。
你需要准备
小提示
- 你可以选择在价格中加上增值税或在计算节约多少成本时加上。只要税率一致,不会改变节约的比率。