Known :
Ratio = Greg : Harry = 1 : 3
Greg's money = £8
Asked :
Harry's money = ...?
Answer :
[tex] \: \ \: \: \: \: \: \: \frac{1}{3} = \frac{greg}{harry} \\ \: \: \: \: \: \: \: \: \frac{1}{3} = \frac{8}{harry} \\ harry = \frac{3 \times 8}{1} \\ harry = 24[/tex]
So, Harry gets £24
Hope it helpful and useful :)