notes to consolidated financial statements 2013 ( continued ) ( amounts in millions , except per share amounts ) debt transactions see note 6 for further information regarding the company 2019s acquisition of acxiom ( the 201cacxiom acquisition 201d ) on october 1 , 2018 ( the 201cclosing date 201d ) .senior notes on september 21 , 2018 , in order to fund the acxiom acquisition and related fees and expenses , we issued a total of $ 2000.0 in aggregate principal amount of unsecured senior notes ( in four separate series of $ 500.0 each , together , the 201csenior notes 201d ) .upon issuance , the senior notes were reflected on our consolidated balance sheets net of discount of $ 5.8 and net of the capitalized debt issuance costs , including commissions and offering expenses of $ 16.1 , both of which will be amortized in interest expense through the respective maturity dates of each series of senior notes using the effective interest method .interest is payable semi-annually in arrears on april 1st and october 1st of each year , commencing on april 1 , 2019 .the issuance was comprised of the following four series of notes : senior notes par value discount at issuance net price at issuance issuance cost net proceeds .
[['senior notes', 'par value', 'discount at issuance', 'net price at issuance', 'issuance cost', 'net proceeds'], ['3.50% ( 3.50 % ) senior notes due 2020', '$ 500.0', '$ 1.0', '$ 499.0', '$ 2.9', '$ 496.1'], ['3.75% ( 3.75 % ) senior notes due 2021', '500.0', '0.3', '499.7', '3.2', '496.5'], ['4.65% ( 4.65 % ) senior notes due 2028', '500.0', '1.7', '498.3', '4.4', '493.9'], ['5.40% ( 5.40 % ) senior notes due 2048', '500.0', '2.8', '497.2', '5.6', '491.6'], ['total', '$ 2000.0', '$ 5.8', '$ 1994.2', '$ 16.1', '$ 1978.1']]
consistent with our other debt securities , the newly issued senior notes include covenants that , among other things , limit our liens and the liens of certain of our consolidated subsidiaries , but do not require us to maintain any financial ratios or specified levels of net worth or liquidity .we may redeem each series of the senior notes at any time in whole or from time to time in part in accordance with the provisions of the indenture , including the applicable supplemental indenture , under which such series of senior notes was issued .if the acxiom acquisition had been terminated or had not closed on or prior to june 30 , 2019 , we would have been required to redeem the senior notes due 2020 , 2021 and 2028 at a redemption price equal to 101% ( 101 % ) of the principal amount thereof , plus accrued and unpaid interest .additionally , upon the occurrence of a change of control repurchase event with respect to the senior notes , each holder of the senior notes has the right to require the company to purchase that holder 2019s senior notes at a price equal to 101% ( 101 % ) of the principal amount thereof , plus accrued and unpaid interest , unless the company has exercised its option to redeem all the senior notes .term loan agreement on october 1 , 2018 , in order to fund the acxiom acquisition and related fees and expenses , we borrowed $ 500.0 through debt financing arrangements with third-party lenders under a three-year term loan agreement ( the 201cterm loan agreement 201d ) , $ 100.0 of which we paid down on december 3 , 2018 .consistent with our other debt securities , the term loan agreement includes covenants that , among other things , limit our liens and the liens of certain of our consolidated subsidiaries .in addition , it requires us to maintain the same financial maintenance covenants as discussed below .loans under the term loan bear interest at a variable rate based on , at the company 2019s option , either the base rate or the eurodollar rate ( each as defined in the term loan agreement ) plus an applicable margin that is determined based on our credit ratings .as of december 31 , 2018 , the applicable margin was 0.25% ( 0.25 % ) for base rate loans and 1.25% ( 1.25 % ) for eurodollar rate loans. .

Question: what was the percentage of issuance costs attributable to the senior notes due 2021
Answer: 19.9%