I know i’m late to the party but you could try to click on the field’s advanced settings, set the default value to 0 then click on "calculator", finally open the options with the blue dots … and select the "display as currency" option. It sould format the field correctly.
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Looking at the front end shows the problem, but a developer cannot fix the problem without understanding how the field is setup in the form builder. I can see your CCY is the Euro setup as a numeric field. And I can see the difference in the summary page where the values appear to have been multiplied by 10. How are you generating the summary page? Are you using the built-in summary field?
Next, are you using an input mask on the fields? Is it REGEX?
I've seen decimal discrepancies because of calculation precision. Are there calculations going on any where on your form before the summary displays?
It's hard to surmise what's happening without hands on access to a site. Perhaps another few screen captures of these fields' settings in the form builder will help clarify a solution. The more you can show, the better. If you're using any custom code for calculations, please use pastebin, gist, or the like, and provide a link we can review publicly. Pasting code directly into these comments is a miserable experience. Trust me on that!