How to get percentage Difference in qliksense

[KimFerguson]

I need one help.

I calculate a Difference Between Current Year Sale and Last Year like. www.kohlsfeedback.com Survey

       num(Sum({$<[HSUBSEGM.descr]={"Clinker and Cement"},
    [CALYEAR]={">=$(vCurrentYear)"}>}[_volume_SO]),'##.0')-  num(Sum({$<[HSUBSEGM.descr]
={"Clinker and Cement"},[CALYEAR]={">
=$(vPreviousYear)<=$(vPreviousYear)"}>}[_volume_SO]),
'##.0')

so I m getting and answer Suppose.

This Year sale is 100 $ and Last Year sale was 50 $. so total growth 50 $.

But I want to show growth in %. In this case my Revenue growth is 50 % because it got double from last year..

[sidhiq91]

@KimFerguson  i guess your revenue growth is 100 perecent since it has doubled from 50 to 100.

So in general we calculate YOY change as

((Sum of current year- Sum of previous year)/ (sum of previous year ))*100