Verified Answer :

luana

\(Difference\ of\ 20\ and\ 8\\ 20-8=12\\\\ \frac{12}{8}*100\%=\frac{1200}{8}\%=150\%\\\\ 150\%\ is\ percent\ of\ change\ from\ 8\ to\ 20\ feet.\)

Xhade

Percent change between 8 and 20 feet is:

\(=\frac{20 - 8}{8} X 100\%\\\\ = \frac{12}{8}X100\% \\\\ =1.5 X 100\%\\\\=\boxed{150\%\ Answer}\)