Create Function with % ( T-SQL)

CREATE FUNCTION dbo.ufnReturnPercentOfNumber(@FirstNumber INT, @SecondNumber INT)
RETURNS NVARCHAR(8)
AS
BEGIN
    DECLARE @Result DECIMAL(8,2) = (@FirstNumber * 1.0) / (@SecondNumber * 1.0) * 100.0
    DECLARE @FinalResult NVARCHAR(8) = Cast(@Result AS NVARCHAR) + '%'
    RETURN @FinalResult
END