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.