I copy these file from core to local folder from app/code/core/Mage/SalesRule/Model/Quote/Discount.php.
**WHAT I NEED TO DO IS ROUND OFF DISCOUNT VALUE WHICH ALSO ROUND OFF TOTAL VALUE AS WELL **
I used round function :
public function fetch(Mage_Sales_Model_Quote_Address $address)
{
$amount = round($address->getDiscountAmount()); /* round up value */
if ($amount != 0) {
$description = $address->getDiscountDescription();
if (strlen($description)) {
$title = Mage::helper('sales')->__('Discount (%s)', $description);
} else {
$title = Mage::helper('sales')->__('Discount');
}
$address->addTotal(array(
'code' => $this->getCode(),
'title' => $title,
'value' => $amount
));
}
return $this;
}