fund collateral , net of the distribution of interest earned to the clearing firms , as well as an increase in trading volumes and the reduction of restricted cash related to the cme clearing europe limited ( cmece ) guaranty the increase in 2016 when compared with 2015 was attributable to higher clearing and transaction fees and market data revenue .
investing activities the increases in cash provided by investing activities from 2015 through 2017 were due to proceeds from the sale of bm&fbovespa shares as well as declines in purchases of property and equipment .
the increase in 2017 when compared with 2016 was also attributable to the sale of the remaining bolsa mexicana de valores , s.a.b .
de c.v .
shares .
financing activities the increases in cash used by financing activities from 2015 through 2017 were attributable to higher cash dividends declared in 2017 and 2016 .
the increase in 2016 was partially offset by proceeds from a finance lease obligation related to the sale leaseback of the datacenter in the first quarter of 2016 .
debt instruments the following table summarizes our debt outstanding as of december 31 , 2017: .

(in millions)
Par Value
Fixed rate notes due September 2022, stated rate of 3.00%<sup>(1)</sup>
$750.0
Fixed rate notes due March 2025, stated rate of 3.00%<sup>(2)</sup>
750.0
Fixed rate notes due September 2043, stated rate of 5.30%<sup>(3)</sup>
750.0

fixed rate notes due september 2022 , stated rate of 3.00% ( 3.00 % ) ( 1 ) .
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$ 750.0 fixed rate notes due march 2025 , stated rate of 3.00% ( 3.00 % ) ( 2 ) .
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750.0 fixed rate notes due september 2043 , stated rate of 5.30% ( 5.30 % ) ( 3 ) .
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750.0 ( 1 ) in august 2012 , we entered into a forward-starting interest rate swap agreement that modified the interest obligation associated with these notes so that the interest payable on the notes effectively became fixed at a rate of 3.32% ( 3.32 % ) .
( 2 ) in december 2014 , we entered into a forward-starting interest rate swap agreement that modified the interest obligation associated with these notes so that the interest payable on the notes effectively became fixed at a rate of 3.11% ( 3.11 % ) .
( 3 ) in august 2012 , we entered into a forward-starting interest rate swap agreement that modified the interest obligation associated with these notes so that the interest payable effectively became fixed at a rate of 4.73% ( 4.73 % ) .
we maintain a $ 2.3 billion multi-currency revolving senior credit facility with various financial institutions , which matures in november 2022 .
the proceeds from this facility can be used for general corporate purposes , which includes providing liquidity for our clearing house in certain circumstances at cme group 2019s discretion and , if necessary , for maturities of commercial paper .
as long as we are not in default under this facility , we have the option to increase it up to $ 3.0 billion with the consent of the agent and lenders providing the additional funds .
this facility is voluntarily pre-payable from time to time without premium or penalty .
under this facility , we are required to remain in compliance with a consolidated net worth test , which is defined as our consolidated shareholders 2019 equity at september 30 , 2017 , giving effect to share repurchases made and special dividends paid during the term of the agreements ( and in no event greater than $ 2.0 billion in aggregate ) , multiplied by 0.65 .
we currently do not have any borrowings outstanding under this facility .
we maintain a 364-day multi-currency revolving secured credit facility with a consortium of domestic and international banks to be used in certain situations by cme clearing .
the facility provides for borrowings of up to $ 7.0 billion .
we may use the proceeds to provide temporary liquidity in the unlikely event of a clearing firm default , in the event of a liquidity constraint or default by a depositary ( custodian for our collateral ) , or in the event of a temporary disruption with the domestic payments system that would delay payment of settlement variation between us and our clearing firms .
clearing firm guaranty fund contributions received in the form of .

Question: Analyse this data from a financial earnings document. what was the decrease in the interest payable between august 2012 and in december 2014?
Choices:
-746.89
1.41
-0.21
0
-0.32
Correct choice index: 2