net sales increased $ 29.9 million , or 6.3% ( 6.3 % ) , due to higher sales volume driven primarily by continuing improvement in the u.s . home products market and the benefit from new product introductions and price increases to help mitigate cumulative raw material cost increases . operating income increased $ 12.6 million , or 20.4% ( 20.4 % ) , due to higher net sales , the benefits from productivity improvements and leveraging sales on our existing fixed cost base . security net sales increased $ 12.8 million , or 2.2% ( 2.2 % ) , due to higher sales volume and price increases to help mitigate cumulative raw material cost increases . these benefits were partially offset by the impact of our exiting of two product lines in our commercial distribution channel . operating income increased $ 5.8 million , or 8.7% ( 8.7 % ) , primarily due to the higher net sales , the benefits from productivity improvements , lower restructuring and other charges ( approximately $ 6 million ) relating to the completion in 2016 of a manufacturing facility relocation , favorable foreign exchange and the related cost savings resulting from the facility relocation . corporate corporate expenses increased by $ 5.7 million mainly due to the impairment of a long lived asset and recognition of an actuarial gain versus an actuarial loss in 2016 and higher defined benefit plan income during 2017 compared to 2016 . ( in millions ) 2017 2016 .

2017: general and administrative expense: -90.3
defined benefit plan income: 4.2
defined benefit plan recognition of actuarial gains ( losses ): 0.5
total corporate expenses: -85.6
2016: general and administrative expense: -80.9
defined benefit plan income: 2.9
defined benefit plan recognition of actuarial gains ( losses ): -1.9
total corporate expenses: -79.9

in future periods the company may record , in the corporate segment , material expense or income associated with actuarial gains and losses arising from periodic remeasurement of our liabilities for defined benefit plans . at a minimum the company will remeasure its defined benefit plan liabilities in the fourth quarter of each year . remeasurements due to plan amendments and settlements may also occur in interim periods during the year . remeasurement of these liabilities attributable to updating our liability discount rates and expected return on assets may , in particular , result in material income or expense recognition . 2016 compared to 2015 total fortune brands net sales net sales increased $ 405.5 million , or 9% ( 9 % ) . the increase was due to higher sales volume primarily from the continuing improvement in u.s . market conditions for home products , the benefit from the acquisitions in our cabinets and plumbing segments and price increases to help mitigate cumulative raw material cost increases and the effect of unfavorable foreign exchange . these benefits were partially offset by unfavorable foreign exchange of approximately $ 27 million and higher sales rebates . cost of products sold cost of products sold increased $ 182.8 million , or 6% ( 6 % ) , due to higher net sales , including the impact of the acquisitions in our cabinets and plumbing segments , partially offset by the benefit of productivity improvements. .

Questions:
what was the change in the defined benefit plan income from 2016 to 2017?
and what was that income in 2016?
how much, then, does that change represent in relation to this 2016 defined benefit plan, in percentage?

Answers:
1.3
2.9
44.8%