Solution:
we are given that
For every pound a company spends on advertising it spends £0.64 on its websites.
we have been asked to express the amount spent on advertising to the amount on its website it's website as a ratio it's in its simplest form.
We can find the required ratio as below
[tex]Ratio=\frac{1}{0.64} \\ \\ Ratio=\frac{100}{64} \\ \\ Ratio=\frac{25}{16} \\[/tex]
Hence the required ratio is 25:16.