旧值是零时如何计算百分比 [英] How to calculate percentage when old value is ZERO

问题描述

在以下情况下，我需要逻辑.我无能为力.

I need the logic for the following situation. I am clueless in doing this.

考虑一月，我有 10 $ 收入，二月，我有 20 $ 收入.

Consider for January I have 10$ revenue and for February I have 20$ revenue.

我的 增长 为((20-10)/10)*100% = 100%

如果我有 3月的收入为 0 $ .

然后我的 增长 为((0-10)/10)*100 % =-100 %.我应该称其为负百分比吗? (我知道它的放气)

Then my growth would be ((0-10)/10)*100 % =-100 %. Should I call this as negative percentage? (I know its deflation)

再走一步

如果现在我在 4月上有 20 $ 收入.

现在如何计算 增长 ?，请确保以下公式是错误的((20-0)/0)*100 %= ?????

我的基本问题是

1. 除了上述方法以外，还有找到更好的增长率的解决方案吗?

1. Is there a better solution to find growth rate, other than the one above?

如果使用上述公式，是否应该以一些值为参考?还是这也是错误的?

If I use the aforementioned formula, should I take some value as reference? or this is wrong also?

推荐答案

如果需要以百分比显示增长，则习惯上在这些情况下显示[NaN]或类似的内容.另一方面，在这种情况下，增长率将报告为$/month.因此，在您的April示例中，增长率将计算为((20-0)/1.

If you're required to show growth as a percentage it's customary to display [NaN] or something similar in these cases. A growth rate, on the other hand, would be reported in this case as $/month. So in your example for April the growth rate would be calculated as ((20-0)/1.

无论如何，由用户决定确定报告此特殊情况的正确方法.您的用户要求中涵盖了吗?

In any event, determining the correct method for reporting this special case is a user decision. Is it covered in your user requirements?

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