costs and expenses our total costs and expenses were as follows: .

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