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Helper II
Helper II

Division (Calculation) returns wrong result



I have an issue with Flow calculating incorrectly.


variables('months') = 36
body('Get_record')?['netamount'] = 4704.48


Now, if I put this in a calculator. It solves to:


4704.48 * 100 = 470448
470448 / 36 = 13068




It seems that flow is not that good in calculating..?


Issue is that I need to round down the number that I get. 

Yes I might be able to round by the Xth number or sth. but why can't it just calculate correctly in the first place?



Community Support
Community Support

Hi @Serf ,


This is very strange. It seems like this issue is coming from the multiply expression. Take a look at what I did below. For some reason the mul(4704.48,100) expression when initialized in a float variable results in 470447.99999...


Let me follow up on my end and see if I can discover why this is happening.



Community Support
Community Support

Hi @Serf 


This is actually something called floating-point arithmetic that most programming languages deal with. They follow the following IEEE standard:


I am working on figuring out a way to potentially do a rounding of sorts to get the correct number. You can see this reproduced in C# below.


Community Support
Community Support

Hi @Serf 


I would be wary of this solution, as I have not tested it extensively, but Flow is very limited on mathematical functions.


If you expect the number to always be a whole number, you can use the following equation in a compose action to convert the number to a string (which somehow rounds the number), split it between the decimal place, take the first part of the split which is your number, and then convert it to an integer.



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