Can't perform basic math with JSONata

[Max-E-Million]

Hello,

I am trying to do add two JSONata fields together but it seems I am doing something wrong. I have boiled it down to not being able to do some baisc math:

JSON-Data: [{"number":"20"}]

Changing the Type to "Number" also doesn't change anything. Why isn't this working?

[yesoreyeram]

It looks like your "number" field is actual string. So you may need some sort of conversion. something like $map($,function($v){ return { "number": $number($v.number) - 5 }}). Potentially there can be better JSONata syntax.