diff --git a/src_core/com/tenwa/voucher/CreateVoucherProcess/CarRatio.java b/src_core/com/tenwa/voucher/CreateVoucherProcess/CarRatio.java
index 6df26eafc..e84961b7d 100644
--- a/src_core/com/tenwa/voucher/CreateVoucherProcess/CarRatio.java
+++ b/src_core/com/tenwa/voucher/CreateVoucherProcess/CarRatio.java
@@ -1,5 +1,6 @@
 package com.tenwa.voucher.CreateVoucherProcess;
 
+import java.math.BigDecimal;
 import java.util.List;
 import java.util.Map;
 import com.amarsoft.are.jbo.BizObject;
@@ -23,9 +24,6 @@ public class CarRatio extends CommonHandler {
 	}
 
 	protected void initDisplayForEdit(BizObject bo) throws Exception {
-		double por = bo.getAttribute("retainfield2").getDouble();
-	    por = por*100;
-		retainfield2 = String.valueOf(por)+"%";
-		bo.setAttributeValue("retainfield2", retainfield2);
+		bo.setAttributeValue("retainfield2", BigDecimal.valueOf(bo.getAttribute("retainfield2").getDouble()).multiply(BigDecimal.valueOf(100)).setScale(2).toString()+"%");
 	}
 }