Financial report context:
costs and expenses our total costs and expenses were as follows: .

Financial table:
( in millions ): costs of services ( excludes depreciation and amortization and restructuring costs ); fiscal years ended march 31 2018: $ 17944; fiscal years ended march 31 2017 ( 1 ): $ 5545; fiscal years ended april 1 2016 ( 1 ): $ 5185; fiscal years ended 2018: 73.0% ( 73.0 % ); fiscal years ended 2017 ( 1 ): 72.9% ( 72.9 % ); 2016 ( 1 ): 73.0% ( 73.0 % )
( in millions ): selling general and administrative ( excludes depreciation and amortization and restructuring costs ); fiscal years ended march 31 2018: 2010; fiscal years ended march 31 2017 ( 1 ): 1279; fiscal years ended april 1 2016 ( 1 ): 1059; fiscal years ended 2018: 8.2; fiscal years ended 2017 ( 1 ): 16.8; 2016 ( 1 ): 14.9
( in millions ): depreciation and amortization; fiscal years ended march 31 2018: 1964; fiscal years ended march 31 2017 ( 1 ): 647; fiscal years ended april 1 2016 ( 1 ): 658; fiscal years ended 2018: 8.0; fiscal years ended 2017 ( 1 ): 8.5; 2016 ( 1 ): 9.3
( in millions ): restructuring costs; fiscal years ended march 31 2018: 803; fiscal years ended march 31 2017 ( 1 ): 238; fiscal years ended april 1 2016 ( 1 ): 23; fiscal years ended 2018: 3.3; fiscal years ended 2017 ( 1 ): 3.1; 2016 ( 1 ): 0.3
( in millions ): interest expense net; fiscal years ended march 31 2018: 246; fiscal years ended march 31 2017 ( 1 ): 82; fiscal years ended april 1 2016 ( 1 ): 85; fiscal years ended 2018: 1.0; fiscal years ended 2017 ( 1 ): 1.1; 2016 ( 1 ): 1.2
( in millions ): debt extinguishment costs; fiscal years ended march 31 2018: 2014; fiscal years ended march 31 2017 ( 1 ): 2014; fiscal years ended april 1 2016 ( 1 ): 95; fiscal years ended 2018: 2014; fiscal years ended 2017 ( 1 ): 2014; 2016 ( 1 ): 1.3
( in millions ): other income net; fiscal years ended march 31 2018: -82 ( 82 ); fiscal years ended march 31 2017 ( 1 ): -10 ( 10 ); fiscal years ended april 1 2016 ( 1 ): -9 ( 9 ); fiscal years ended 2018: -0.3 ( 0.3 ); fiscal years ended 2017 ( 1 ): -0.1 ( 0.1 ); 2016 ( 1 ): -0.1 ( 0.1 )
( in millions ): total costs and expenses; fiscal years ended march 31 2018: $ 22885; fiscal years ended march 31 2017 ( 1 ): $ 7781; fiscal years ended april 1 2016 ( 1 ): $ 7096; fiscal years ended 2018: 93.2% ( 93.2 % ); fiscal years ended 2017 ( 1 ): 102.3% ( 102.3 % ); 2016 ( 1 ): 99.9% ( 99.9 % )

Additional report context:
( 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. .

Question: in fiscal 2018 what percentage of total costs and expenses was costs of services ( excludes depreciation and amortization and restructuring costs ) ?
Answer: 78%