Desplay Results as a percentage

I have Script that outputs a percentage value in the results, Purchase_Percent_2014 and YTD_Purchase_Percent_2015 currently they go out 6 decimal places I would like it to display just 1 decimal place with the % symbol for example 22.5% currently it is displaying 22.500000

SELECT        VPP.Vendor_ID, VPP.Vendor_Name, VPP.Purchase_Ammount_2013, VPP.Purchase_Ammount_2014, VPP.YTD_Purchase_Ammount_2015, ISNULL(VPP.Purchase_Percent_2014, 0) AS Purchase_Percent_2014, 
ISNULL(VPP.YTD_Purchase_Percent_2015, 0) AS YTD_Purchase_Percent_2015
FROM            (SELECT        Vendor_ID, Vendor_Name, SUM(CASE WHEN ([Year]) = 2013 THEN Purchase_Ammount ELSE 0 END) AS Purchase_Ammount_2013, SUM(CASE WHEN ([Year]) 
= 2014 THEN Purchase_Ammount ELSE 0 END) AS Purchase_Ammount_2014, SUM(CASE WHEN ([Year]) = 2015 THEN Purchase_Ammount ELSE 0 END) AS YTD_Purchase_Ammount_2015, 
(SUM(CASE WHEN ([Year]) = 2014 THEN Purchase_Ammount ELSE 0 END) - SUM(CASE WHEN ([Year]) = 2013 THEN Purchase_Ammount ELSE 0 END)) * 100 / NULLIF (SUM(CASE WHEN ([Year]) 
= 2013 THEN Purchase_Ammount ELSE 0 END), 0) AS Purchase_Percent_2014, (SUM(CASE WHEN ([Year]) = 2015 THEN Purchase_Ammount ELSE 0 END) - SUM(CASE WHEN ([Year]) 
= 2014 THEN Purchase_Ammount ELSE 0 END)) * 100 / NULLIF (SUM(CASE WHEN ([Year]) = 2014 THEN Purchase_Ammount ELSE 0 END), 0) AS YTD_Purchase_Percent_2015
FROM            SSG_Vendor_Yearly_Totals
GROUP BY Vendor_ID, Vendor_Name, Class_ID
HAVING         (Class_ID IN ('MAN', 'VEN'))) AS VPP LEFT OUTER JOIN
(SELECT        CUSTNMBR, CUSTCLAS
FROM            RM00101
WHERE        (CUSTCLAS IN ('B', 'CF', 'COLLECTIONS', 'EMP', 'FA', 'OBS', 'PA', 'PD', 'SA', 'SD'))) AS RM ON VPP.Vendor_ID = RM.CUSTNMBR
WHERE        (RM.CUSTNMBR IS NULL)
ORDER BY VPP.Vendor_ID

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