equilateral triange a_{0}b_{0} c_{0} is given. for every n, natural number, a n; b n ,c n are midpoints of sides b n-1 c n-1 ,c n-1 a n-1 ,a n-1 b n-1 , respectively. part of triangle a_{0}b_{0} c_{0} that is outside of triangle a_{1}b_{1} c_{1} shade in red color. on the same way shade part of triangle a_{2}b_{2} c_{2} outside of triangle a_{3}b_{3} c_{3} and so on. continue the process and find percentage of triangle a_{0}b_{0} c_{0} that is shaded.

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