Vraces: 0.25 = 1(1-r)^n
0.25 = (1-r)^60
-0.75 = r^60
r = - 0.75^(1/60) = 0.016666...7
r = [Incorrect]
My calculation and understanding is completely off. If you spoke to me in math maybe I could understand better.
And sandwich man, your answer is incorrect, I thought that too at first. That is almost the answer, but almost doesn't cut it if we're talking math. Thanks for trying though.