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:
| Unnamed: 0                                  |   3/31/2007 |   3/31/2008 |   3/31/2009 |   3/31/2010 |   3/31/2011 |   3/31/2012 |
|:--------------------------------------------|------------:|------------:|------------:|------------:|------------:|------------:|
| abiomed inc                                 |         100 |       96.19 |       35.87 |       75.55 |      106.37 |      162.45 |
| nasdaq composite index                      |         100 |       94.11 |       63.12 |       99.02 |      114.84 |      127.66 |
| nasdaq medical equipment sic code 3840-3849 |         100 |       82.91 |       41.56 |       77.93 |       94.54 |       74.4  |

Question:
what is the roi of an investment in abiomed inc from march 2007 to march 2010?


pre_text: performance graph the following graph compares the yearly change in the cumulative total stockholder return for our last five full fiscal years , based upon the market price of our common stock , with the cumulative total return on a nasdaq composite index ( u.s .
companies ) and a peer group , the nasdaq medical equipment-sic code 3840-3849 index , which is comprised of medical equipment companies , for that period .
the performance graph assumes the investment of $ 100 on march 31 , 2007 in our common stock , the nasdaq composite index ( u.s .
companies ) and the peer group index , and the reinvestment of any and all dividends. .
post_text: this graph is not 201csoliciting material 201d under regulation 14a or 14c of the rules promulgated under the securities exchange act of 1934 , is not deemed filed with the securities and exchange commission and is not to be incorporated by reference in any of our filings under the securities act of 1933 , as amended , or the exchange act whether made before or after the date hereof and irrespective of any general incorporation language in any such filing .
transfer agent american stock transfer & trust company , 59 maiden lane , new york , ny 10038 , is our stock transfer agent. .
label: -0.24450000000000002
qa: answer: -24.5%
ann_table_rows: 1
steps: op: minus1-1
arg1: 75.55
arg2: 100
res: -24.45
op: divide1-2
arg1: #0
arg2: 100
res: -24.5%
program: subtract(75.55, 100), divide(#0, 100)
gold_inds: table_1: the abiomed inc of 3/31/2007 is 100 ; the abiomed inc of 3/31/2008 is 96.19 ; the abiomed inc of 3/31/2009 is 35.87 ; the abiomed inc of 3/31/2010 is 75.55 ; the abiomed inc of 3/31/2011 is 106.37 ; the abiomed inc of 3/31/2012 is 162.45 ;
exe_ans: -0.24450000000000002
tfidftopn: text_2: the performance graph assumes the investment of $ 100 on march 31 , 2007 in our common stock , the nasdaq composite index ( u.s .
table_2: The nasdaq composite index of 3/31/2007 is 100 ; The nasdaq composite index of 3/31/2008 is 94.11 ; The nasdaq composite index of 3/31/2009 is 63.12 ; The nasdaq composite index of 3/31/2010 is 99.02 ; The nasdaq composite index of 3/31/2011 is 114.84 ; The nasdaq composite index of 3/31/2012 is 127.66 ;
program_re: divide(subtract(75.55, 100), 100)
model_input: text_2
the performance graph assumes the investment of $ 100 on march 31 , 2007 in our common stock , the nasdaq composite index ( u.s .
table_1
the abiomed inc of 3/31/2007 is 100 ; the abiomed inc of 3/31/2008 is 96.19 ; the abiomed inc of 3/31/2009 is 35.87 ; the abiomed inc of 3/31/2010 is 75.55 ; the abiomed inc of 3/31/2011 is 106.37 ; the abiomed inc of 3/31/2012 is 162.45 ;
table_3
the nasdaq medical equipment sic code 3840-3849 of 3/31/2007 is 100 ; the nasdaq medical equipment sic code 3840-3849 of 3/31/2008 is 82.91 ; the nasdaq medical equipment sic code 3840-3849 of 3/31/2009 is 41.56 ; the nasdaq medical equipment sic code 3840-3849 of 3/31/2010 is 77.93 ; the nasdaq medical equipment sic code 3840-3849 of 3/31/2011 is 94.54 ; the nasdaq medical equipment sic code 3840-3849 of 3/31/2012 is 74.40 ;