In an infinite GP, each term is equal to 7times the sum of the terms that follow it. What is the common ration of the progression?? Ans= 1/8.. explanation plzz

Let the G.P. be a, a*r, a*r^2 and so on till infinity.
Given, a = Sum of the infinite terms starting from a*r
Therefore a = 7 [a*r / 1-r]
'a' will get cancelled on both sides. Solve for 'r'.
r = 1/8