corporate/other corporate/other includes certain unallocated costs of global staff functions ( including finance , risk , human resources , legal and compliance ) , other corporate expenses and unallocated global operations and technology expenses and income taxes , as well as corporate treasury , certain north america legacy consumer loan portfolios , other legacy assets and discontinued operations ( for additional information on corporate/other , see 201ccitigroup segments 201d above ) . at december 31 , 2018 , corporate/other had $ 91 billion in assets , an increase of 17% ( 17 % ) from the prior year . in millions of dollars 2018 2017 2016 % (  % ) change 2018 vs . 2017 % (  % ) change 2017 vs . 2016 .

Table:
in millions of dollars | 2018 | 2017 | 2016 | % (  % ) change2018 vs . 2017 | % (  % ) change2017 vs . 2016
net interest revenue | $ 2254 | $ 2000 | $ 3045 | 13% ( 13 % ) | ( 34 ) % (  % )
non-interest revenue | -171 ( 171 ) | 1132 | 2188 | nm | -48 ( 48 )
total revenues net of interest expense | $ 2083 | $ 3132 | $ 5233 | ( 33 ) % (  % ) | ( 40 ) % (  % )
total operating expenses | $ 2272 | $ 3814 | $ 5042 | ( 40 ) % (  % ) | ( 24 ) % (  % )
net credit losses | $ 21 | $ 149 | $ 435 | ( 86 ) % (  % ) | ( 66 ) % (  % )
credit reserve build ( release ) | -218 ( 218 ) | -317 ( 317 ) | -456 ( 456 ) | 31 | 30
provision ( release ) for unfunded lending commitments | -3 ( 3 ) | 2014 | -8 ( 8 ) | 2014 | 100
provision for benefits and claims | -2 ( 2 ) | -7 ( 7 ) | 98 | 71 | nm
provisions for credit losses and for benefits and claims | $ -202 ( 202 ) | $ -175 ( 175 ) | $ 69 | -15 ( 15 ) | nm
income ( loss ) from continuing operations before taxes | $ 13 | $ -507 ( 507 ) | $ 122 | nm | nm
income taxes ( benefits ) | -113 ( 113 ) | 19064 | -455 ( 455 ) | nm | nm
income ( loss ) from continuing operations | $ 126 | $ -19571 ( 19571 ) | $ 577 | nm | nm
income ( loss ) from discontinued operations net of taxes | -8 ( 8 ) | -111 ( 111 ) | -58 ( 58 ) | 93 | -91 ( 91 )
net income ( loss ) before attribution of noncontrolling interests | $ 118 | $ -19682 ( 19682 ) | $ 519 | nm | nm
noncontrolling interests | 11 | -6 ( 6 ) | -2 ( 2 ) | nm | nm
net income ( loss ) | $ 107 | $ -19676 ( 19676 ) | $ 521 | nm | nm
nm not meaningful 2018 vs .
2017 net income was $ 107 million in 2018 , compared to a net loss of $ 19.7 billion in the prior year , primarily driven by the $ 19.8 billion one-time , non-cash charge recorded in the tax line in 2017 due to the impact of tax reform .
results in 2018 included the one-time benefit of $ 94 million in the tax line , related to tax reform .
for additional information , see 201csignificant accounting policies and significant estimates 2014income taxes 201d below .
excluding the one-time impact of tax reform in 2018 and 2017 , net income decreased 92% ( 92 % ) , reflecting lower revenues , partially offset by lower expenses , lower cost of credit and tax benefits related to the reorganization of certain non-u.s .
subsidiaries .
the tax benefits were largely offset by the release of a foreign currency translation adjustment ( cta ) from aoci to earnings ( for additional information on the cta release , see note 19 to the consolidated financial statements ) .
revenues decreased 33% ( 33 % ) , driven by the continued wind-down of legacy assets .
expenses decreased 40% ( 40 % ) , primarily driven by the wind-down of legacy assets , lower infrastructure costs and lower legal expenses .
provisions decreased $ 27 million to a net benefit of $ 202 million , primarily due to lower net credit losses , partially offset by a lower net loan loss reserve release .
net credit losses declined 86% ( 86 % ) to $ 21 million , primarily reflecting the impact of ongoing divestiture activity and the continued wind-down of the north america mortgage portfolio .
the net reserve release declined by $ 96 million to $ 221 million , and reflected the continued wind-down of the legacy north america mortgage portfolio and divestitures .
2017 vs .
2016 the net loss was $ 19.7 billion , compared to net income of $ 521 million in the prior year , primarily driven by the one-time impact of tax reform .
excluding the one-time impact of tax reform , net income declined 69% ( 69 % ) to $ 168 million , reflecting lower revenues , partially offset by lower expenses and lower cost of credit .
revenues declined 40% ( 40 % ) , primarily reflecting the continued wind-down of legacy assets and the absence of gains related to debt buybacks in 2016 .
revenues included approximately $ 750 million in gains on asset sales in the first quarter of 2017 , which more than offset a roughly $ 300 million charge related to the exit of citi 2019s u.s .
mortgage servicing operations in the quarter .
expenses declined 24% ( 24 % ) , reflecting the wind-down of legacy assets and lower legal expenses , partially offset by approximately $ 100 million in episodic expenses primarily related to the exit of the u.s .
mortgage servicing operations .
also included in expenses is an approximately $ 255 million provision for remediation costs related to a card act matter in 2017 .
provisions decreased $ 244 million to a net benefit of $ 175 million , primarily due to lower net credit losses and a lower provision for benefits and claims , partially offset by a lower net loan loss reserve release .
net credit losses declined 66% ( 66 % ) , primarily reflecting the impact of ongoing divestiture activity and the continued wind-down of the north america mortgage portfolio .
the decline in the provision for benefits and claims was primarily due to lower insurance activity .
the net reserve release declined $ 147 million , and reflected the continued wind-down of the legacy north america mortgage portfolio and divestitures. .

Question: what was the percentage change in total operating expenses between 2016 and 2018?
Answer: -55%
Calculation: subtract(2272, 5042), divide(#0, 5042)