I'm not quite sure I understand what context your goal would be used in, but there are two approaches that come to mind.
Either you just state your goal is to reach a price of $80 and you are currently at $61, which means you are 61/80 = .7625 = 76% of the way to your goal.
Alternatively, if you want starting price factored in then, you could rephrase ...
Let B(y) be the balance of your account at the beginning of year y, immediately after your annual contribution (which we assume happens at the beginning of the year). Then:
B(0) = B0 + p
B(1) = (B0 + p)r + p
B(2) = ((B0 + p)r + p)r
B(y) = B0*r^y + p(1 + r + … + r^y)
= B0*r^y + p(r^(y+1) - 1)/(r - 1) ***
Substituting in your numbers:
B(y) = 1000(1....