2018 ppg annual report and form 10-k 59 other acquisitions in 2018 , 2017 , and 2016 , the company completed several smaller business acquisitions . the total consideration paid for these acquisitions , net of cash acquired , debt assumed and other post closing adjustments , was $ 108 million , $ 74 million and $ 43 million , respectively . in january 2018 , ppg acquired procoatings , a leading architectural paint and coatings wholesaler located in the netherlands . procoatings , established in 2001 , distributes a large portfolio of well-known professional paint brands through its network of 23 multi-brand stores . the company employs nearly 100 people . the results of this business since the date of acquisition have been reported within the architectural coatings americas and asia pacific business within the performance coatings reportable segment . in january 2017 , ppg acquired certain assets of automotive refinish coatings company futian xinshi ( 201cfutian 201d ) , based in the guangdong province of china . futian distributes its products in china through a network of more than 200 distributors . in january 2017 , ppg completed the acquisition of deutek s.a. , a leading romanian paint and architectural coatings manufacturer , from the emerging europe accession fund . deutek , established in 1993 , manufactures and markets a large portfolio of well-known professional and consumer paint brands , including oskar and danke! . the company 2019s products are sold in more than 120 do-it-yourself stores and 3500 independent retail outlets in romania . divestitures glass segment in 2017 , ppg completed a multi-year strategic shift in the company's business portfolio , resulting in the exit of all glass operations which consisted of the global fiber glass business , ppg's ownership interest in two asian fiber glass joint ventures and the flat glass business . accordingly , the results of operations , including the gains on the divestitures , and cash flows have been recast as discontinued operations for all periods presented . ppg now has two reportable business segments . the net sales and income from discontinued operations related to the former glass segment for the three years ended december 31 , 2018 , 2017 , and 2016 were as follows: .

2018: net sales: 2014
income from operations: 21
net gains on the divestitures of businesses: 2014
income tax expense: 5
income from discontinued operations net of tax: 16
2017: net sales: 217
income from operations: 30
net gains on the divestitures of businesses: 343
income tax expense: 140
income from discontinued operations net of tax: 233
2016: net sales: 908
income from operations: 111
net gains on the divestitures of businesses: 421
income tax expense: 202
income from discontinued operations net of tax: 330

during 2018 , ppg released $ 13 million of previously recorded accruals and contingencies established in conjunction with the divestitures of businesses within the former glass segment as a result of completed actions , new information and updated estimates . also during 2018 , ppg made a final payment of $ 20 million to vitro s.a.b . de c.v related to the transfer of certain pension obligations upon the sale of the former flat glass business . north american fiber glass business on september 1 , 2017 , ppg completed the sale of its north american fiber glass business to nippon electric glass co . ltd . ( 201cneg 201d ) . cash proceeds from the sale were $ 541 million , resulting in a pre-tax gain of $ 343 million , net of certain accruals and contingencies established in conjunction with the divestiture . ppg 2019s fiber glass operations included manufacturing facilities in chester , south carolina , and lexington and shelby , north carolina ; and administrative and research-and-development operations in shelby and in harmar , pennsylvania , near pittsburgh . the business , which employed more than 1000 people and had net sales of approximately $ 350 million in 2016 , supplies the transportation , energy , infrastructure and consumer markets . flat glass business in october 2016 , ppg completed the sale of its flat glass manufacturing and glass coatings operations to vitro s.a.b . de c.v . ppg received approximately $ 740 million in cash proceeds and recorded a pre-tax gain of $ 421 million on the sale . under the terms of the agreement , ppg divested its entire flat glass manufacturing and glass coatings operations , including production sites located in fresno , california ; salem , oregon ; carlisle , pennsylvania ; and wichita falls , texas ; four distribution/fabrication facilities located across canada ; and a research-and-development center located in harmar , pennsylvania . ppg 2019s flat glass business included approximately 1200 employees . the business manufactures glass that is fabricated into products used primarily in commercial and residential construction . notes to the consolidated financial statements .

Questions:
what was the operating income return on sales in 2016?
and what is this return as a portion of the total net sales in that year?
and in the year of 2015, what was this portion representation of that return on sales?

Answers:
111
12.2%
13.8%