i'm still working on it, before i used a normal number field but because i couldn't use this for currency someone adviced me to use a masked input, so

i'm still working on it, before i used a normal number field but because i couldn't use this for currency someone adviced me to use a masked input, so i could use €.

But when i use . for thousand separator and , for decimals the formulation on "Uw maandelijkse aflossing bedraagt:" is not working

I was able to replicate mentioned issue when I tested your form and on my cloned form. 

I would suggest you to use a comma for thousand separator or to remove separator. 

Here is my demo form: https://form.jotformpro.com/72135496049966 

I have used a comma for thousand separator.

I also set the first field of your calculation to Number instead of String. 

Hope this helps to solve the issue.

Yes, the % is super

but can i do the same for the loan amount fields, where i use the masked input, i don't like the way the masked input behaves in a web, if you want to change the amount to play around in the calculation its not that simpel, yeah the , for thousand and the . for decimals, in fact in Belgium we are used to do it the other way around, the , is are decimals, and or nothing or . for the thousands.

That's why i preferr to use the € symbol like the %, but how did you do it, i don't find it in the CSS, or any other way

For % symbol, I used Text field and then I positioned that field with the CSS code I provided you on the other thread. 

The same can be done with other fields as well. You can add the € symbol after the loan fields. 

However to avoid confusion, please reply on this thread https://www.jotform.com/answers/1213859 and tell us which fields are the loan fields. Provide us the names of those fields. 

I would also suggest you to finish your form first. Make sure that calculation is working properly. If you will replace the Masked Input widgets with basic number fields, I would suggest you to do that first and then once the form is done we will help you to the € symbol after the loan fields. 

Hello,

I've made the necessary changes, so everything works, the masked inputs are replaced by number fields, conditions are corrected, and more or less the form layout, width, labelsize, ...

The fields where i would like to have the € symbol are translated, in totall 3 fields and i would like that the % as well as the € symbol are bold and not to small (if i may make a wish, i'm already happy with wath you guys do for me so dont feel obligated to do so, i will figure it out afterwarts i hope).

Thanks in advance, and perhaps you can send it to you're developpers a currency field where you can work with in calculations, or a field where theire is a prefix and suffix possibility so things like icons, and % symbols are also possible without the use of widgets, you may take a look at nexforms in wordpress for instance pretty formbuilder 

Here is my new form: https://form.jotformpro.com/72145150549959 

Feel free to clone it. 

I have moved your question regarding dropdown fields to this thread and I will provide you an answer there shortly: https://www.jotform.com/answers/1215229 

I am not sure if I understood your request regarding a currency field correctly. 

To avoid confusion on this thread, please open a new thread and provide us more details about your request. Also tell us to which type of fields do you want to apply a prefix or suffix.