difference between two number fields

[Assia Touati]

HI, 

I have a number field named "previous time spent", and i want to calculate the difference between this field and the timeSpent field. Using automation. 

I tried to write : 

{{issue.timeSpent}}-{{issue.customField_10076}} 

where issue.customField_10076 : is the field that i've created 

but it's not working : it writes me only the timeSpent ! 

please i need help ! thanks 

[Aditya Sastry · Accepted solution]

did you check the output of value in your custom field?

[Assia Touati]

i've fixed the problem. 

The cause was that i had to use the math expression {{#=}}....{{/}}for the smart values

exemple : 

{{#=}}{{issue.Invoice Amount}} * 1.2{{/}}

[Aditya Sastry]

cool.

[Ionascu Irina]

Hello, is this working also to calculate the resolution time of the tickets? For example the time between the creation time and the time the ticket was set as Resolved. I have followed the steps :

1. Create custom field (date time picker type or number type, tried with both of them)

2.  Tried this with the following formula, but it is not working.. 

{{issue.solved.diff(issue.created).days}}

Any idea which might be the problem? I am using Jira server