Best way to format json numbers to local number with comma as decimal separator

marceloverdijk

I'm using a json response including numbers like:
'amount': 10.5

I want to render this in the table like 10,50 (note the , for decimal separator and always 2 digits behind separator).
Note that eg a value of .2 I want to render like 0,20

I've looked on the plugins page (especially the Formatted numbers plugin) but don't understand how I could do this best.

Any help appreciated.