计算设备故障率：增加%

huimv-farm-v2/huimv-pigfarm-local-device/src/main/java/com/huimv/huimvpigfarmlocaldevice/service/impl/DeviceImpl.java

@@ -201,7 +201,7 @@ public class DeviceImpl implements IDevice {
         JSONObject outJo = new JSONObject();
         outJo.put("total",total);
         outJo.put("num",num);
-        outJo.put("rate",rate);
+        outJo.put("rate",rate+"%");
         return new Result(ResultCode.SUCCESS,outJo);
     }