Task: Table-QA (source dataset: FinQA)

Task: 
You are given a table containing structured data and a natural language question referring to the table. Your goal is to analyze the table and provide an accurate and concise answer based on the given data.

Instructions:
1. Understand the Table: Examine the structure, headers, and data in the table. Identify relevant columns and rows related to the question.
2. Interpret the Question: Determine whether the question requires direct retrieval, aggregation, comparison, sorting, filtering, or inference.
3. Extract the Answer: Use logical reasoning and numerical operations (if necessary) to derive the correct response from the table.
4. Format the Answer: No explanation, return the answer in a structured JSON format: {"answer": <answer>}. If the question cannot be answered due to missing or ambiguous data, return a JSON response with {"answer": null}.

Table:
| ( in millions )      | 2017           | 2016         | 2015         |
|:---------------------|:---------------|:-------------|:-------------|
| operating activities | $ -799 ( 799 ) | $ 262        | $ 1277       |
| investing activities | -4130 ( 4130 ) | -472 ( 472 ) | -466 ( 466 ) |
| financing activities | 10919          | -102 ( 102 ) | -515 ( 515 ) |

Question:
what is the net change in cash during 2015?


pre_text: 36 | bhge 2017 form 10-k liquidity and capital resources our objective in financing our business is to maintain sufficient liquidity , adequate financial resources and financial flexibility in order to fund the requirements of our business .
at december 31 , 2017 , we had cash and equivalents of $ 7.0 billion compared to $ 981 million of cash and equivalents at december 31 , 2016 .
cash and equivalents includes $ 997 million of cash held on behalf of ge at december 31 , 2017 .
at december 31 , 2017 , approximately $ 3.2 billion of our cash and equivalents was held by foreign subsidiaries compared to approximately $ 878 million at december 31 , 2016 .
a substantial portion of the cash held by foreign subsidiaries at december 31 , 2017 has been reinvested in active non-u.s .
business operations .
at december 31 , 2017 , our intent is , among other things , to use this cash to fund the operations of our foreign subsidiaries , and we have not changed our indefinite reinvestment decision as a result of u.s .
tax reform but will reassess this during the course of 2018 .
if we decide at a later date to repatriate those funds to the u.s. , we may be required to provide taxes on certain of those funds , however , due to the enactment of u.s .
tax reform , repatriations of foreign earnings will generally be free of u.s .
federal tax but may incur other taxes such as withholding or state taxes .
on july 3 , 2017 , in connection with the transactions , bhge llc entered into a new five-year $ 3 billion committed unsecured revolving credit facility ( 2017 credit agreement ) with commercial banks maturing in july 2022 .
as of december 31 , 2017 , there were no borrowings under the 2017 credit agreement .
on november 3 , 2017 , bhge llc entered into a commercial paper program under which it may issue from time to time up to $ 3 billion in commercial paper with maturities of no more than 397 days .
at december 31 , 2017 , there were no borrowings outstanding under the commercial paper program .
the maximum combined borrowing at any time under both the 2017 credit agreement and the commercial paper program is $ 3 billion .
on november 6 , 2017 , we announced that our board of directors authorized bhge llc to repurchase up to $ 3 billion of its common units from the company and ge .
the proceeds of such repurchase that are distributed to the company will be used to repurchase class a shares of the company on the open market or in privately negotiated transactions .
on december 15 , 2017 , we filed a shelf registration statement on form s-3 with the sec to give us the ability to sell up to $ 3 billion in debt securities in amounts to be determined at the time of an offering .
any such offering , if it does occur , may happen in one or more transactions .
the specific terms of any securities to be sold will be described in supplemental filings with the sec .
the registration statement will expire in 2020 .
during the year ended december 31 , 2017 , we used cash to fund a variety of activities including certain working capital needs and restructuring costs , capital expenditures , business acquisitions , the payment of dividends and share repurchases .
we believe that cash on hand , cash flows generated from operations and the available credit facility will provide sufficient liquidity to manage our global cash needs .
cash flows cash flows provided by ( used in ) each type of activity were as follows for the years ended december 31: .
post_text: operating activities our largest source of operating cash is payments from customers , of which the largest component is collecting cash related to product or services sales including advance payments or progress collections for work to be performed .
the primary use of operating cash is to pay our suppliers , employees , tax authorities and others for a wide range of material and services. .
label: 296
qa: answer: 296
ann_table_rows: 1
2
3
steps: op: add2-1
arg1: 1277
arg2: -466
res: 811
op: add2-2
arg1: #0
arg2: -515
res: 296
program: add(1277, -466), add(#0, -515)
gold_inds: table_1: ( in millions ) the operating activities of 2017 is $ -799 ( 799 ) ; the operating activities of 2016 is $ 262 ; the operating activities of 2015 is $ 1277 ;
table_2: ( in millions ) the investing activities of 2017 is -4130 ( 4130 ) ; the investing activities of 2016 is -472 ( 472 ) ; the investing activities of 2015 is -466 ( 466 ) ;
table_3: ( in millions ) the financing activities of 2017 is 10919 ; the financing activities of 2016 is -102 ( 102 ) ; the financing activities of 2015 is -515 ( 515 ) ;
exe_ans: 296
program_re: add(add(1277, -466), -515)
model_input: text_1
at december 31 , 2017 , we had cash and equivalents of $ 7.0 billion compared to $ 981 million of cash and equivalents at december 31 , 2016 .
text_24
cash flows cash flows provided by ( used in ) each type of activity were as follows for the years ended december 31: .
table_1
( in millions ) the operating activities of 2017 is $ -799 ( 799 ) ; the operating activities of 2016 is $ 262 ; the operating activities of 2015 is $ 1277 ;