Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.


devon energy corporation and subsidiaries notes to consolidated financial statements 2013 ( continued ) proved undeveloped reserves the following table presents the changes in devon 2019s total proved undeveloped reserves during 2015 ( mmboe ) . . <table class='wikitable'><tr><td>1</td><td>-</td><td>u.s .</td><td>canada</td><td>total</td></tr><tr><td>2</td><td>proved undeveloped reserves as of december 31 2014</td><td>305</td><td>384</td><td>689</td></tr><tr><td>3</td><td>extensions and discoveries</td><td>13</td><td>11</td><td>24</td></tr><tr><td>4</td><td>revisions due to prices</td><td>-115 ( 115 )</td><td>80</td><td>-35 ( 35 )</td></tr><tr><td>5</td><td>revisions other than price</td><td>-40 ( 40 )</td><td>-80 ( 80 )</td><td>-120 ( 120 )</td></tr><tr><td>6</td><td>conversion to proved developed reserves</td><td>-88 ( 88 )</td><td>-94 ( 94 )</td><td>-182 ( 182 )</td></tr><tr><td>7</td><td>proved undeveloped reserves as of december 31 2015</td><td>75</td><td>301</td><td>376</td></tr></table> proved undeveloped reserves decreased 45% ( 45 % ) from year-end 2014 to year-end 2015 , and the year-end 2015 balance represents 17% ( 17 % ) of total proved reserves . drilling and development activities increased devon 2019s proved undeveloped reserves 24 mmboe and resulted in the conversion of 182 mmboe , or 26% ( 26 % ) , of the 2014 proved undeveloped reserves to proved developed reserves . costs incurred to develop and convert devon 2019s proved undeveloped reserves were approximately $ 2.2 billion for 2015 . additionally , revisions other than price decreased devon 2019s proved undeveloped reserves 120 mmboe primarily due to evaluations of certain properties in the u.s . and canada . the largest revisions , which reduced reserves by 80 mmboe , relate to evaluations of jackfish bitumen reserves . of the 40 mmboe revisions recorded for u.s . properties , a reduction of approximately 27 mmboe represents reserves that devon now does not expect to develop in the next five years , including 20 mmboe attributable to the eagle ford . a significant amount of devon 2019s proved undeveloped reserves at the end of 2015 related to its jackfish operations . at december 31 , 2015 and 2014 , devon 2019s jackfish proved undeveloped reserves were 301 mmboe and 384 mmboe , respectively . development schedules for the jackfish reserves are primarily controlled by the need to keep the processing plants at their 35 mbbl daily facility capacity . processing plant capacity is controlled by factors such as total steam processing capacity and steam-oil ratios . furthermore , development of these projects involves the up-front construction of steam injection/distribution and bitumen processing facilities . due to the large up-front capital investments and large reserves required to provide economic returns , the project conditions meet the specific circumstances requiring a period greater than 5 years for conversion to developed reserves . as a result , these reserves are classified as proved undeveloped for more than five years . currently , the development schedule for these reserves extends through to 2030 . at the end of 2015 , approximately 184 mmboe of proved undeveloped reserves at jackfish have remained undeveloped for five years or more since the initial booking . no other projects have proved undeveloped reserves that have remained undeveloped more than five years from the initial booking of the reserves . furthermore , approximately 180 mmboe of proved undeveloped reserves at jackfish will require in excess of five years , from the date of this filing , to develop . price revisions 2015 2013 reserves decreased 302 mmboe primarily due to lower commodity prices across all products . the lower bitumen price increased canadian reserves due to the decline in royalties , which increases devon 2019s after- royalty volumes . 2014 2013 reserves increased 9 mmboe primarily due to higher gas prices in the barnett shale and the anadarko basin , partially offset by higher bitumen prices , which result in lower after-royalty volumes , in canada. .
Question: what percentage does the year-end 2015 balance represent in relation to the total proved reserves?

17.0