Answer :

(25/365)x100=6.85 (3 s.f)
[tex]\begin{array}{ccc}365&-&100\%\\25&-&x\%\end{array}\ \ \ |cross\ multiply\ both\ sides\\\\365\cdot x=25\cdot100\\365x=2500\ \ \ \ \ |divide\ both\ sides\ by\ 365\\\\x=\frac{2500}{365}\\\\x=\frac{2500:5}{365:5}=\frac{500}{73}=\boxed{6\frac{62}{73}\ (\%)\approx7\%}[/tex]