🧩 Inconsistent Math Results Based on Expression Order — Same Formula, Different Outputs

Need help App Organization
1

Hi everyone,

I’m encountering a frustrating issue with a rental pricing calculation where the same formula produces different results depending on the order of the terms, even though mathematically they’re identical.

I’m working on a fashion rental platform and calculating total price like this:

  • Daily price × number of days
  • Plus platform fee (5%)
  • Plus cleaning fee (fixed)

My expression looks like this:

(AirDate/TimePicker A's end - start: formatted as days) 
× Current page's Product's daily price  
+  
(AirDate/TimePicker A's end - start: formatted as days) 
× Current page's Product's daily price × 0.05  
+  
Current page's Product's cleaning price

This should work. But in practice, I get different totals depending on the order of the elements in the expression — even though the logic is the same.

Has anyone seen this behavior before? Any ideas on how to solve it?

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Screenshot 2025-06-19 at 21.25.46
Screenshot 2025-06-19 at 21.25.461920×956 62.4 KB

2

Hey @redress.hungary,

I think the reason for this is PEMDAS, try using parenthesis (you need to enable in your app settings under experimental features)

3

Hey Johnny, Thank you for your answer. I tried it but still doesn’t work :frowning:
No idea what the issue could be.

4

Did you put the parenthesis in the right place?