note 15 financial derivatives we use derivative financial instruments ( derivatives ) primarily to help manage exposure to interest rate , market and credit risk and reduce the effects that changes in interest rates may have on net income , the fair value of assets and liabilities , and cash flows . we also enter into derivatives with customers to facilitate their risk management activities . derivatives represent contracts between parties that usually require little or no initial net investment and result in one party delivering cash or another type of asset to the other party based on a notional amount and an underlying as specified in the contract . derivative transactions are often measured in terms of notional amount , but this amount is generally not exchanged and it is not recorded on the balance sheet . the notional amount is the basis to which the underlying is applied to determine required payments under the derivative contract . the underlying is a referenced interest rate ( commonly libor ) , security price , credit spread or other index . residential and commercial real estate loan commitments associated with loans to be sold also qualify as derivative instruments . the following table presents the notional amounts and gross fair values of all derivative assets and liabilities held by pnc : table 124 : total gross derivatives .
what percentage of notional contract amount of total gross derivatives at december 31 , 2014 was from derivatives designated as hedging instruments under gaap?
( a ) included in other assets on our consolidated balance sheet . ( b ) included in other liabilities on our consolidated balance sheet . all derivatives are carried on our consolidated balance sheet at fair value . derivative balances are presented on the consolidated balance sheet on a net basis taking into consideration the effects of legally enforceable master netting agreements and any related cash collateral exchanged with counterparties . further discussion regarding the rights of setoff associated with these legally enforceable master netting agreements is included in the offsetting , counterparty credit risk , and contingent features section below . our exposure related to risk participations where we sold protection is discussed in the credit derivatives section below . any nonperformance risk , including credit risk , is included in the determination of the estimated net fair value of the derivatives . further discussion on how derivatives are accounted for is included in note 1 accounting policies . derivatives designated as hedging instruments under gaap certain derivatives used to manage interest rate and foreign exchange risk as part of our asset and liability risk management activities are designated as accounting hedges under gaap . derivatives hedging the risks associated with changes in the fair value of assets or liabilities are considered fair value hedges , derivatives hedging the variability of expected future cash flows are considered cash flow hedges , and derivatives hedging a net investment in a foreign subsidiary are considered net investment hedges . designating derivatives as accounting hedges allows for gains and losses on those derivatives , to the extent effective , to be recognized in the income statement in the same period the hedged items affect earnings . the pnc financial services group , inc . 2013 form 10-k 187 .