Explanation:
Each number in the series is 1/3 of the previous number:
3
3/3 = 1
1/3 = 1/3
(1/3)/3 = 1/9
(1/9)/3 = 1/27
(1/27)/3 = 1/81
(1/81)/3 = 1/243
(1/243)/3 = 1/729
and the pattern continues so
4.6m questions
5.9m answers