Distinct Count based on multiple column

Hi,

I want to display value which is as described below.

My calculation is like this

var a =Distinct count of value 1

var b= Count of Value 2

var ans=b/a

I want to display ans as my result.

But Problem is there I have multiple records for all records. That means for value 1 (distinct) I got multiple values. So my calculation is not properly set as my requirement. So please help me in this case. If Found Unique count that is based on multiple column(value 1 and value 2) for var b.

Thanks.