Need urgent help in DAX

[Srinivas3350]

Hi I am using a measure to show % the problem if there is no data in the future it is showing blank is there any chance can we show it as -100% like that 

GBP % =

VAR CurrentYearASP = [sum GBP]

VAR PreviousYearASP =

    CALCULATE(

        [sum GBP],

        DATEADD('Date table'[Date], -1, YEAR)

    )

RETURN

    DIVIDE(CurrentYearASP - PreviousYearASP, PreviousYearASP)

this is the measure i am using the matrix table. can anyone help me please 

[Srinivas3350]

Thank you so much @nandukrishnavs it worked 

[nandukrishnavs · Accepted solution]

@Srinivas3350 

Try this 

GBP % =
VAR CurrentYearASP = [sum GBP]
VAR PreviousYearASP =
    CALCULATE ( [sum GBP], DATEADD ( 'Date table'[Date], -1, YEAR ) )
VAR _result =
    DIVIDE ( CurrentYearASP - PreviousYearASP, PreviousYearASP )
RETURN
    IF ( ISBLANK ( _result ), -1, _result )