pre_text: costs and expenses our total costs and expenses were as follows: .
post_text: ( 1 ) fiscal 2017 and 2016 costs and expenses are for csc only and therefore are not directly comparable to fiscal 2018 costs and expenses . during fiscal 2018 , we took actions to optimize our workforce , extract greater supply chain efficiencies and rationalize our real estate footprint . we reduced our labor base by approximately 13% ( 13 % ) through a combination of automation , best shoring and pyramid correction . we also rebalanced our skill mix , including the addition of more than 18000 new employees and the ongoing retraining of the existing workforce . in real estate , we restructured over four million square feet of space during fiscal 2018 . costs of services fiscal 2018 compared with fiscal 2017 cost of services excluding depreciation and amortization and restructuring costs ( "cos" ) was $ 17.9 billion for fiscal 2018 as compared to $ 5.5 billion for fiscal 2017 . the increase in cos was driven by the hpes merger and was partially offset by reduction in costs associated with our labor base and real estate . cos for fiscal 2018 included $ 192 million of pension and opeb actuarial and settlement gains associated with our defined benefit pension plans . fiscal 2017 compared with fiscal 2016 cos as a percentage of revenues remained consistent year over year . the $ 360 million increase in cos was largely related to our acquisitions and a $ 31 million gain on the sale of certain intangible assets in our gis segment during fiscal 2016 not present in the current fiscal year . this increase was offset by management's ongoing cost reduction initiatives and a year-over-year favorable change of $ 28 million to pension and opeb actuarial and settlement losses associated with our defined benefit pension plans . the amount of restructuring charges , net of reversals , excluded from cos was $ 219 million and $ 7 million for fiscal 2017 and 2016 , respectively . selling , general and administrative fiscal 2018 compared with fiscal 2017 selling , general and administrative expense excluding depreciation and amortization and restructuring costs ( "sg&a" ) was $ 2.0 billion for fiscal 2018 as compared to $ 1.3 billion for fiscal 2017 . the increase in sg&a was driven by the hpes merger . integration , separation and transaction-related costs were $ 408 million during fiscal 2018 , as compared to $ 305 million during fiscal 2017. .
table: Fiscal Years Ended Percentage of Revenues
table: (in millions) March 31, 2018 March 31, 2017<sup>(1)</sup> April 1, 2016<sup>(1)</sup> 2018 2017<sup>(1)</sup> 2016<sup>(1)</sup>
table: Costs of services (excludes depreciation and amortization and restructuring costs) $17,944 $5,545 $5,185 73.0% 72.9% 73.0%
table: Selling, general and administrative (excludes depreciation and amortization and restructuring costs) 2,010 1,279 1,059 8.2 16.8 14.9
table: Depreciation and amortization 1,964 647 658 8.0 8.5 9.3
table: Restructuring costs 803 238 23 3.3 3.1 0.3
table: Interest expense, net 246 82 85 1.0 1.1 1.2
table: Debt extinguishment costs — — 95 — — 1.3
table: Other income, net (82) (10) (9) (0.3) (0.1) (0.1)
table: Total costs and expenses $22,885 $7,781 $7,096 93.2% 102.3% 99.9%
question: Analyse this data from a financial earnings document. what % (  % ) of total costs were the costs of services in 2018?