To solve this question we use the following ratio
[tex]\frac{No\text{of families that have newspaper}}{\text{Total number of families}}[/tex]No of families with newspaper = 5
No of families in the neighbourhood = 6
If the number of families currently with newspaper = 75 then,
[tex]\frac{5}{6}=\frac{75}{\text{total number of families in the neighbourood}}[/tex]