+118723 $$\\y=log_{25000}45000\\\\
25000^y=25000^{log_{25000}45000}\\\\
25000^y=45000\\\\
log_{10}25000^y=log_{10}45000\\\\
ylog_{10}25000=log_{10}45000\\\\
y=\frac{log_{10}45000}{log_{10}25000}\\\\
$now you can do it on the site calc$\\\\
OR\\\\
$you could have gone straight to the last line using the change of base rule$$$
+118723 $$\\y=log_{25000}45000\\\\
25000^y=25000^{log_{25000}45000}\\\\
25000^y=45000\\\\
log_{10}25000^y=log_{10}45000\\\\
ylog_{10}25000=log_{10}45000\\\\
y=\frac{log_{10}45000}{log_{10}25000}\\\\
$now you can do it on the site calc$\\\\
OR\\\\
$you could have gone straight to the last line using the change of base rule$$$
