Final answer:
The ratio of the amount spent on advertising to the amount spent on the website is £1.25 : £1.
Step-by-step explanation:
To express the amount spent on advertising to the amount spent on its website as a ratio, we can use the given information that for every pound spent on advertising, £0.80 is spent on the website.
So, the ratio can be written as:
£1 : £0.80
To simplify this ratio, we can divide both sides by £0.80:
£1 ÷ £0.80 = £1.25
Therefore, the simplified ratio is:
£1 : £0.80 = £1.25 : £1